ci: add block-stable workflow

.gitea/workflows/block-stable.yaml

@@ -0,0 +1,33 @@
+name: Block Stable Releases (Untested)
+
+# This workflow auto-deletes "stable" releases until we're ready.
+# DELETE THIS FILE when all testing is complete and stable releases should be allowed.
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  block-stable:
+    runs-on: ubuntu-latest
+    if: contains(github.event.release.tag_name, 'stable')
+    steps:
+      - name: Delete stable release (not yet tested)
+        env:
+          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+        run: |
+          echo "Blocking stable release: ${{ github.event.release.tag_name }}"
+          echo "Reason: Code has not been fully tested yet."
+          echo "Remove .gitea/workflows/block-stable.yaml when ready for stable releases."
+
+          # Delete the release via API
+          curl -s -X DELETE \
+            -H "Authorization: token ${GITEA_TOKEN}" \
+            "${{ github.server_url }}/api/v1/repos/${{ github.repository }}/releases/${{ github.event.release.id }}"
+
+          # Also delete the tag to keep things clean
+          curl -s -X DELETE \
+            -H "Authorization: token ${GITEA_TOKEN}" \
+            "${{ github.server_url }}/api/v1/repos/${{ github.repository }}/tags/${{ github.event.release.tag_name }}" || true
+
+          echo "Stable release blocked and deleted."