CCM-15317: Adding New PR Enforcement Action

.github/actions/check-pr-title-format/action.yml

@@ -0,0 +1,51 @@
+name: Validate PR title
+description: Validate pull request title against a regex
+inputs:
+  title:
+    description: Pull request title
+    required: true
+  pattern:
+    description: Regex pattern the PR title must match
+    required: true
+  error_message:
+    description: Custom error message
+    required: false
+    default: Pull request title does not match required format
+runs:
+  using: composite
+  steps:
+    - name: Validate PR title
+      shell: bash
+      env:
+        TITLE: ${{ inputs.title }}
+        PATTERN: ${{ inputs.pattern }}
+        MESSAGE: ${{ inputs.error_message }}
+      run: |
+        title="$TITLE"
+        pattern="$PATTERN"
+        message="$MESSAGE"
+
+        echo "PR title: $title"
+        echo "Required pattern: $pattern"
+
+        if [ -z "$pattern" ]; then
+          echo "::error::Input 'pattern' must be a non-empty regular expression"
+          exit 1
+        fi
+        if printf '%s\n' "$title" | grep -Eq -- "$pattern"; then
+          echo "PR title is valid"
+        else
+          status=$?
+          case "$status" in
+            1)
+              echo "::error::$message"
+              ;;
+            2)
+              echo "::error::Input 'pattern' is not a valid regular expression: $pattern"
+              ;;
+            *)
+              echo "::error::Unexpected error while validating PR title"
+              ;;
+          esac
+          exit 1
+        fi