[feat] Combine PRs GitHub Action yaml file

With the commit, a sequence of PRs created automatically by @dependabot
will be combined into a new PR.

.github/workflows/combine-dependabot-prs.yml

@@ -0,0 +1,21 @@
+name: Combine PRs
+
+on:
+  workflow_dispatch
+
+# The minimum permissions required to run this Action
+permissions:
+  contents: write
+  pull-requests: write
+  checks: read
+
+jobs:
+  combine-prs:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: combine-prs
+        id: combine-prs
+        uses: github/[email protected]
+        with:
+          labels: "dependencies"