feat(actions): Add copy README workflow

.github/workflows/copy-readme.yaml

@@ -0,0 +1,23 @@
+---
+name: Copy README to gh-pages
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [master]
+    paths:
+      - README.md
+
+jobs:
+  copy-readme:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Copy README to gh-pages
+        uses: planetoftheweb/copy-to-branches@v1
+        env:
+          key: master
+          files: README.md
+          branches: gh-pages