[all] chore: add validate pr title workflow

Author: savacano28

.github/workflows/validate-pr-title.yml

@@ -0,0 +1,32 @@
+name: "Validate PR Title"
+
+on:
+  pull_request:
+    types: [ opened, edited, reopened, ready_for_review, synchronize ]
+
+jobs:
+  validate-pr-title:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: write
+
+    steps:
+      - name: Check PR title format
+        shell: bash
+        run: |
+          TITLE="${{ github.event.pull_request.title }}"
+          echo "PR title: $TITLE"
+          
+          # Regex for:
+          # [category/subcategory] type(scope?): description (#123?)
+          PATTERN='^\[([a-z]+(/[a-z]+)*)\] (feat|fix|chore|docs|style|refactor|perf|test|build|ci|revert)(\([a-z]+\))?: [a-z].*( \(#[0-9]+\))$'
+          
+          if [[ ! "$TITLE" =~ $PATTERN ]]; then
+            echo "❌ Invalid PR title."
+            echo "Required format:"
+            echo "[category] type(scope?): description (#123)"
+            exit 1
+          fi
+          
+          echo "✅ PR title is valid."