[various] Add `missing_code_block_language_in_doc_comment` lint to flutter/packages. (#6473)

Adds this Dartdoc-related lint to the flutter repository, in replacement
of the Dartdoc warning (missingCodeBlockLanguage) because it will be
deprecated and removed soon.

flutter/flutter already has this lint as well. Adding to flutter/engine
with https://github.com/flutter/engine/pull/51944.

Lint Proposal: https://github.com/dart-lang/linter/issues/4904

Issue covering future work removing the `// ignore:`s:
https://github.com/flutter/flutter/issues/157620

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [relevant style guides] and ran the
auto-formatter. (Unlike the flutter/flutter repo, the flutter/packages
repo does use `dart format`.)
- [x] I signed the [CLA].
- [x] The title of the PR starts with the name of the package surrounded
by square brackets, e.g. `[shared_preferences]`
- [x] I [linked to at least one issue that this PR fixes] in the
description above.
- [x] I updated `pubspec.yaml` with an appropriate new version according
to the [pub versioning philosophy], or this PR is [exempt from version
changes].
- [x] I updated `CHANGELOG.md` to add a description of the change,
[following repository CHANGELOG style].
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/packages/blob/main/CONTRIBUTING.md
[Tree Hygiene]: https://github.com/flutter/flutter/wiki/Tree-hygiene
[relevant style guides]:
https://github.com/flutter/packages/blob/main/CONTRIBUTING.md#style
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/wiki/Tree-hygiene#handling-breaking-changes
[Discord]: https://github.com/flutter/flutter/wiki/Chat
[linked to at least one issue that this PR fixes]:
https://github.com/flutter/flutter/wiki/Tree-hygiene#overview
[pub versioning philosophy]: https://dart.dev/tools/pub/versioning
[exempt from version changes]:
https://github.com/flutter/flutter/wiki/Contributing-to-Plugins-and-Packages#version-and-changelog-updates
[following repository CHANGELOG style]:
https://github.com/flutter/flutter/wiki/Contributing-to-Plugins-and-Packages#changelog-style
[test-exempt]:
https://github.com/flutter/flutter/wiki/Tree-hygiene#tests
37 files changed
tree: 9203cc3643726eb3906d7b944de2a0c4255570bd
  1. .ci/
  2. .github/
  3. packages/
  4. script/
  5. third_party/
  6. .ci.yaml
  7. .clang-format
  8. .gitattributes
  9. .gitignore
  10. .metadata
  11. analysis_options.yaml
  12. AUTHORS
  13. CODEOWNERS
  14. CONTRIBUTING.md
  15. customer_testing.bat
  16. customer_testing.sh
  17. LICENSE
  18. README.md
README.md

Flutter Packages

Release Status Flutter CI Status

This repo is a companion repo to the main flutter repo. It contains the source code for Flutter's first-party packages (i.e., packages developed by the core Flutter team). Check the packages directory to see all packages.

These packages are also available on pub.

Issues

Please file any issues, bugs, or feature requests in the main flutter repo. Issues pertaining to this repository are labeled “package”.

Contributing

If you wish to contribute a new package to the Flutter ecosystem, please see the documentation for developing packages. You can store your package source code in any GitHub repository (the present repo is only intended for packages developed by the core Flutter team). Once your package is ready you can publish to the pub repository.

If you wish to contribute a change to any of the existing packages in this repo, please review our contribution guide, and send a pull request.

Packages

These are the packages hosted in this repository:

PackagePubPointsPopularityIssuesPull requests
animationspub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
camerapub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
cross_filepub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
css_colorspub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
cupertino_iconspub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
espressopub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
extension_google_sign_in_as_googleapis_authpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
file_selectorpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
flutter_adaptive_scaffoldpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
flutter_imagepub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
flutter_lintspub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
flutter_markdownpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
flutter_plugin_android_lifecyclepub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
flutter_svgpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
flutter_svg_testpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
flutter_template_imagespub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
go_routerpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
go_router_builderpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
google_maps_flutterpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
google_sign_inpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
image_pickerpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
interactive_media_adspub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
in_app_purchasepub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
ios_platform_imagespub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
local_authpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
metrics_centerpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
multicast_dnspub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
palette_generatorpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
path_parsingpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
path_providerpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
pigeonpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
pointer_interceptorpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
plugin_platform_interfacepub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
processpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
quick_actionspub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
google_identity_services_webpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
rfwpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
shared_preferencespub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
standard_message_codecpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
two_dimensional_scrollablespub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
url_launcherpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
vector_graphicspub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
vector_graphics_codecpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
vector_graphics_compilerpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
video_playerpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
web_benchmarkspub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
webview_flutterpub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label
xdg_directoriespub packagepub pointspopularityGitHub issues by-labelGitHub pull requests by-label