Improve release mechanism (two stages: draft release + publish to PyPi upon conversion)

.github/workflows/create-release.yml

@@ -0,0 +1,19 @@
+name: Create Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  create-release:
+    name: Create a candidate release
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v3
+        with:
+          draft: true
+          body: "See [change log](https://github.com/oraios/serena/blob/main/CHANGELOG.md)"