ci: Replace outdated commitlint action

Use the commitlint npm package directly instead as recommended at:

https://commitlint.js.org/guides/ci-setup.html

Author: RandomByte

.github/workflows/commitlint.yml

@@ -19,6 +19,8 @@ jobs:
     steps:
 
     - uses: actions/checkout@v6
+      with:
+        fetch-depth: 0
 
     - name: Setup Node.js
       uses: actions/setup-node@v6
@@ -56,6 +58,14 @@ jobs:
     - name: Perform ESLint check
       run: npm run lint
 
+    - name: Validate current commit (last commit) with commitlint
+      if: github.event_name == 'push'
+      run: npm run lint:commit -- --last --verbose
+
+    - name: Validate PR commits with commitlint
+      if: github.event_name == 'pull_request'
+      run: npm run lint:commit -- --from ${{ github.event.pull_request.base.sha }} --to ${{ github.event.pull_request.head.sha }} --verbose
+
     - name: Perform Licenses check
       run: npm run check-licenses