chore(.github/workflows): add dependabot auto-merge workflow

New Features:
- Add dependabot auto-merge workflow (dependabot-auto-merge.yml)

.github/workflows/dependabot-auto-merge.yml

@@ -0,0 +1,22 @@
+name: Dependabot Auto-Merge
+
+on:
+  pull_request_target:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  dependabot:
+    runs-on: ubuntu-latest
+    # Check that it's actually dependabot
+    if: github.event.pull_request.user.login == 'dependabot[bot]'
+    steps:
+      - name: Merge PR from Dependabot
+        uses: fastify/github-action-merge-dependabot@v3
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          use-github-auto-merge: true
+          target: minor