Switch Windows to CMake (#60629)

* First pass at CMake files; untested

* First pass of adding CMake generation logic on Windows

* Misc fixes

* Get bundling working, start incoprorating CMake build into tool

* Fix debug, exe name.

* Add resources

* Move cmake.dart

* Rip out all the vcxproj/solution plumbing

* Fix plugin cmake generation

* Build with cmake rather than calling VS directly

* Adjust Windows plugin template to match standard header directory structure

* Pass config selection when building

* Partially fix multi-config handling

* Rev template version

* Share the CMake generation instead of splitting it out

* VS build/run cycle works, with slightly awkward requirement to always build all

* Update manifest

* Plugin template fixes

* Minor adjustments

* Build install as part of build command, instead of separately

* Test cleanup

* Update Linux test for adjusted generated CMake approach

* Plugin test typo fix

* Add missing stub file for project test

* Add a constant for VS generator

packages/flutter_tools/lib/src/project.dart

diff --git a/packages/flutter_tools/lib/src/project.dart b/packages/flutter_tools/lib/src/project.dart
index 2fe310c..c3b566e 100644
--- a/packages/flutter_tools/lib/src/project.dart
+++ b/packages/flutter_tools/lib/src/project.dart
@@ -329,6 +329,27 @@
   File get podManifestLock;
 }
 
+/// Represents a CMake-based sub-project.
+///
+/// This defines interfaces common to Windows and Linux projects.
+abstract class CmakeBasedProject {
+  /// The parent of this project.
+  FlutterProject get parent;
+
+  /// Whether the subproject (either Windows or Linux) exists in the Flutter project.
+  bool existsSync();
+
+  /// The native project CMake specification.
+  File get cmakeFile;
+
+  /// Contains definitions for FLUTTER_ROOT, LOCAL_ENGINE, and more flags for
+  /// the build.
+  File get generatedCmakeConfigFile;
+
+  /// Includable CMake with rules and variables for plugin builds.
+  File get generatedPluginCmakeFile;
+}
+
 /// Represents the iOS sub-project of a Flutter project.
 ///
 /// Instances will reflect the contents of the `ios/` sub-folder of
@@ -995,18 +1016,28 @@
 }
 
 /// The Windows sub project
-class WindowsProject extends FlutterProjectPlatform {
-  WindowsProject._(this.project);
+class WindowsProject extends FlutterProjectPlatform implements CmakeBasedProject {
+  WindowsProject._(this.parent);
 
-  final FlutterProject project;
+  @override
+  final FlutterProject parent;
 
   @override
   String get pluginConfigKey => WindowsPlugin.kConfigKey;
 
   @override
-  bool existsSync() => _editableDirectory.existsSync() && solutionFile.existsSync();
+  bool existsSync() => _editableDirectory.existsSync() && cmakeFile.existsSync();
 
-  Directory get _editableDirectory => project.directory.childDirectory('windows');
+  @override
+  File get cmakeFile => _editableDirectory.childFile('CMakeLists.txt');
+
+  @override
+  File get generatedCmakeConfigFile => ephemeralDirectory.childFile('generated_config.cmake');
+
+  @override
+  File get generatedPluginCmakeFile => managedDirectory.childFile('generated_plugins.cmake');
+
+  Directory get _editableDirectory => parent.directory.childDirectory('windows');
 
   /// The directory in the project that is managed by Flutter. As much as
   /// possible, files that are edited by Flutter tooling after initial project
@@ -1018,24 +1049,6 @@
   /// checked in should live here.
   Directory get ephemeralDirectory => managedDirectory.childDirectory('ephemeral');
 
-  /// Contains definitions for FLUTTER_ROOT, LOCAL_ENGINE, and more flags for
-  /// the build.
-  File get generatedPropertySheetFile => ephemeralDirectory.childFile('Generated.props');
-
-  /// Contains configuration to add plugins to the build.
-  File get generatedPluginPropertySheetFile => managedDirectory.childFile('GeneratedPlugins.props');
-
-  // The MSBuild project file.
-  File get vcprojFile => _editableDirectory.childFile('Runner.vcxproj');
-
-  // The MSBuild solution file.
-  File get solutionFile => _editableDirectory.childFile('Runner.sln');
-
-  /// The file where the VS build will write the name of the built app.
-  ///
-  /// Ideally this will be replaced in the future with inspection of the project.
-  File get nameFile => ephemeralDirectory.childFile('exe_filename');
-
   /// The directory to write plugin symlinks.
   Directory get pluginSymlinkDirectory => ephemeralDirectory.childDirectory('.plugin_symlinks');
 
@@ -1043,15 +1056,16 @@
 }
 
 /// The Linux sub project.
-class LinuxProject extends FlutterProjectPlatform {
-  LinuxProject._(this.project);
+class LinuxProject extends FlutterProjectPlatform implements CmakeBasedProject {
+  LinuxProject._(this.parent);
 
-  final FlutterProject project;
+  @override
+  final FlutterProject parent;
 
   @override
   String get pluginConfigKey => LinuxPlugin.kConfigKey;
 
-  Directory get _editableDirectory => project.directory.childDirectory('linux');
+  Directory get _editableDirectory => parent.directory.childDirectory('linux');
 
   /// The directory in the project that is managed by Flutter. As much as
   /// possible, files that are edited by Flutter tooling after initial project
@@ -1066,14 +1080,13 @@
   @override
   bool existsSync() => _editableDirectory.existsSync();
 
-  /// The Linux project CMake specification.
+  @override
   File get cmakeFile => _editableDirectory.childFile('CMakeLists.txt');
 
-  /// Contains definitions for FLUTTER_ROOT, LOCAL_ENGINE, and more flags for
-  /// the build.
+  @override
   File get generatedCmakeConfigFile => ephemeralDirectory.childFile('generated_config.cmake');
 
-  /// Includable CMake with rules and variables for plugin builds.
+  @override
   File get generatedPluginCmakeFile => managedDirectory.childFile('generated_plugins.cmake');
 
   /// The directory to write plugin symlinks.