Add changelog_verifier workflow

Signed-off-by: Junwei Dai <junweid@amazon.com>

Author: Junwei Dai

.github/workflows/changelog_verifier.yml

@@ -0,0 +1,24 @@
+name: "Changelog Verifier"
+on:
+  push:
+    branches-ignore:
+      - 'whitesource-remediate/**'
+      - 'backport/**'
+  pull_request:
+    branches: main
+    types: [opened, synchronize, reopened, ready_for_review, labeled, unlabeled]
+
+jobs:
+  # Enforces the update of a changelog file on every pull request
+  verify-changelog:
+    if: github.repository == 'opensearch-project/dashboards-flow-framework'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          ref: ${{ github.event.pull_request.head.sha }}
+
+      - uses: dangoslen/changelog-enforcer@v3
+        with:
+          skipLabels: "autocut, skip-changelog"