CI: add automatic release creation on tag push

Author: srlehn

.github/workflows/release.yml

@@ -9,7 +9,17 @@ permissions:
   contents: write
 
 jobs:
-  release:
+  create-release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - name: Create release
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: gh release create "$GITHUB_REF_NAME" --generate-notes
+
+  build:
+    needs: create-release
     runs-on: ubuntu-latest
     strategy:
       matrix: