ci: add auto format action

.github/workflows/auto-format.yml

@@ -0,0 +1,35 @@
+name: auto-format
+
+on:
+  workflow_dispatch:
+  pull_request:
+
+env:
+  GH_TOKEN: ${{ github.token }}
+
+jobs:
+  auto-format:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        if: github.event_name == 'pull_request'
+        with:
+          fetch-depth: 0
+          ref: ${{ github.event.pull_request.head.ref }}
+
+      - uses: actions/checkout@v4
+        if: github.event_name == 'push'
+        with:
+          fetch-depth: 0
+
+      - name: format
+        uses: pre-commit/[email protected]
+        continue-on-error: true
+
+      - name: commit & push
+        run: |
+          git config --global user.name "github-actions[bot]"
+          git config --global user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add .
+          git commit -m "ci: 🤖 format everything with pre-commit" && git push || echo "nothing to commit"