Add automerge workflow (#551)

.github/workflows/automerge.yml

@@ -0,0 +1,26 @@
+name: Auto Merge Dependabot PRs
+
+on:
+  pull_request_target:
+    types:
+      - opened
+      - synchronize
+      - reopened
+  workflow_dispatch:
+
+permissions:
+  contents: write   # Required for merging the PR
+  pull-requests: write  # Required for managing pull requests
+
+jobs:
+  automerge:
+    if: github.actor == 'dependabot[bot]' || github.event_name == 'workflow_dispatch'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Enable Auto-Merge for Dependabot PR
+        run: gh pr merge ${{ github.event.pull_request.number }} --auto --squash
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}