[workflow] Sync readme with gh-pages branch

.github/workflows/sync-readme.yaml

@@ -0,0 +1,27 @@
+on:
+  push:
+    branches:
+      - 'main'
+    paths:
+      - 'README.md'
+
+jobs:
+  build:
+    permissions:
+      contents: write
+
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: |
+          cp -f README.md ${{ runner.temp }}/README.md
+      - uses: actions/checkout@v4
+        with:
+          ref: gh-pages
+      - run: |
+          cp -f ${{ runner.temp }}/README.md .
+          git config user.name "$GITHUB_ACTOR"
+          git config user.email "[email protected]"
+          git add README.md
+          git commit --signoff -m "Sync README from main"
+          git push