maint: Apply the MIT-0 license to .github/workflows/

This is a cherry-pick of commit 76745cede9f5a920c1eaddfa8537fc0c5f4a0cdb
from branch 'libpng18'.

Signed-off-by: Cosmin Truta <ctruta@gmail.com>

.github/workflows/lint.yml

diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 65a63b4..12318ea 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -1,3 +1,6 @@
+# Copyright (C) 2024 Cosmin Truta
+# SPDX-License-Identifier: MIT-0
+
 name: Linting libpng
 
 on:

.github/workflows/verify-linux.yml

diff --git a/.github/workflows/verify-linux.yml b/.github/workflows/verify-linux.yml
index a6f5a6b..da048f3 100644
--- a/.github/workflows/verify-linux.yml
+++ b/.github/workflows/verify-linux.yml
@@ -1,3 +1,6 @@
+# Copyright (C) 2025 Cosmin Truta
+# SPDX-License-Identifier: MIT-0
+
 name: Verifying libpng on Linux
 
 on:

.github/workflows/verify-macos.yml

diff --git a/.github/workflows/verify-macos.yml b/.github/workflows/verify-macos.yml
index 51850d4..d61174f 100644
--- a/.github/workflows/verify-macos.yml
+++ b/.github/workflows/verify-macos.yml
@@ -1,3 +1,6 @@
+# Copyright (C) 2025 Cosmin Truta
+# SPDX-License-Identifier: MIT-0
+
 name: Verifying libpng on macOS
 
 on:

.github/workflows/verify-windows.yml

diff --git a/.github/workflows/verify-windows.yml b/.github/workflows/verify-windows.yml
index b559c76..02c2c61 100644
--- a/.github/workflows/verify-windows.yml
+++ b/.github/workflows/verify-windows.yml
@@ -1,3 +1,6 @@
+# Copyright (C) 2025 Cosmin Truta
+# SPDX-License-Identifier: MIT-0
+
 name: Verifying libpng on Windows
 
 on:

LICENSES/MIT-0.txt

diff --git a/LICENSES/MIT-0.txt b/LICENSES/MIT-0.txt
new file mode 100644
index 0000000..30c6295
--- /dev/null
+++ b/LICENSES/MIT-0.txt
@@ -0,0 +1,16 @@
+MIT No Attribution
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

REUSE.toml

diff --git a/REUSE.toml b/REUSE.toml
index d286f1b..4f385e5 100644
--- a/REUSE.toml
+++ b/REUSE.toml
@@ -3,3 +3,7 @@
 [[annotations]]
 SPDX-License-Identifier = "MIT"
 path = "ci/**"
+
+[[annotations]]
+SPDX-License-Identifier = "MIT-0"
+path = ".github/workflows/**"