chore: add Github Action to validate PR commits

Author: hyiso

.github/workflows/pr_commits.yml

@@ -0,0 +1,21 @@
+on:
+  pull_request:
+    branches: [ "main" ]
+    types: [opened, synchronize]
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+          ref: ${{ github.head_ref }}
+
+      - uses: dart-lang/[email protected]
+
+      - name: Get Dependencies
+        run: dart pub get
+
+      - name: Validate PR Commits
+        run: VERBOSE=true dart run commitlint_cli --from="origin/${{ github.base_ref }}" --to="${{ github.head_ref }}" --config lib/commitlint.yaml