ci: add conventional commits validation

Author: matiyas

.github/workflows/commitlint.yml

@@ -0,0 +1,35 @@
+name: Commit Lint
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, edited]
+
+jobs:
+  commitlint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Validate PR title
+        uses: amannn/action-semantic-pull-request@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          types: |
+            feat
+            fix
+            docs
+            style
+            refactor
+            perf
+            test
+            build
+            ci
+            chore
+            revert
+          requireScope: false
+          subjectPattern: ^[a-z].+$
+          subjectPatternError: |
+            The subject "{subject}" must start with a lowercase letter.

CONTRIBUTING.md

@@ -29,10 +29,38 @@ Feature requests are welcome! Please open an issue and describe:
 3. Make your changes
 4. Ensure tests pass and code style is maintained
 5. Update documentation (`doc/vue-sfc-format.txt`) if you've added or changed features
-6. Commit your changes (`git commit -am 'Add some feature'`)
+6. Commit your changes following the [Conventional Commits](https://www.conventionalcommits.org/) format
 7. Push to the branch (`git push origin feature/my-new-feature`)
 8. Create a new Pull Request
 
+### Commit Message Format
+
+This project follows the [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/) specification.
+
+```
+<type>: <description>
+```
+
+**Types:**
+- `feat`: A new feature
+- `fix`: A bug fix
+- `docs`: Documentation changes
+- `style`: Code style changes (formatting, whitespace)
+- `refactor`: Code refactoring without feature changes
+- `perf`: Performance improvements
+- `test`: Adding or updating tests
+- `build`: Build system or dependency changes
+- `ci`: CI/CD configuration changes
+- `chore`: Maintenance tasks
+
+**Examples:**
+```
+feat: add support for custom script formatters
+fix: resolve parsing error with nested template tags
+docs: update configuration examples in README
+refactor: simplify section extraction logic
+```
+
 ## Development Setup
 
 ### Testing