build: Add checker for PR title

.github/workflows/pr_build.yml

@@ -126,3 +126,18 @@ jobs:
       - if: matrix.test-target == 'java'
         name: Java test steps
         uses: ./.github/actions/java-test
+  check-pr-title:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Check PR title
+        env:
+          PR_TITLE: ${{ github.event.pull_request_title }}
+        run: |
+          echo "PR title = $PR_TITLE"
+          if ! echo $PR_TITLE | grep -Eq '^(\w+)(\(.+\))?: .+$'; then
+            echo "PR title does not follow conventional commit style."
+            echo "Please use a title in the format: type: message, or type(scope): message"
+            exit 1
+          fi
+