ci: add PR title conventional commit validation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: machado144

.github/workflows/pr-title.yml

@@ -0,0 +1,29 @@
+name: PR Title
+
+on:
+  pull_request:
+    types: [opened, edited, synchronize, reopened]
+    branches:
+      - main
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Validate PR title follows Conventional Commits
+        run: |
+          TITLE="${{ github.event.pull_request.title }}"
+          if ! echo "$TITLE" | grep -qE "^(feat|fix|docs|style|refactor|test|chore|build|ci|perf|revert)(\(.+\))?(!)?: .+"; then
+            echo "::error::PR title must follow Conventional Commits format"
+            echo ""
+            echo "Expected: <type>[optional scope][!]: <description>"
+            echo ""
+            echo "Examples:"
+            echo "  feat: add new feature"
+            echo "  fix(api): resolve null pointer"
+            echo "  feat!: breaking change"
+            echo ""
+            echo "Types: feat, fix, docs, style, refactor, test, chore, build, ci, perf, revert"
+            exit 1
+          fi
+          echo "PR title is valid: $TITLE"