ci: add release workflow

.github/workflows/release.yml

@@ -0,0 +1,22 @@
+on:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: write
+  pull-requests: write
+
+name: release-please
+
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: googleapis/release-please-action@v4
+        with:
+          # Default token:
+          # token: ${{ secrets.GITHUB_TOKEN }}
+          # However, CI checks won't run on release-please PRs
+          # unless a Personal Access Token is configured
+          release-type: simple