Allow testing feature branches on forks, enable UI trigger

Author: hugovk

.github/workflows/ci.yml

@@ -1,10 +1,6 @@
 name: CI
 
-on:
-  pull_request:
-    branches: [main]
-  push:
-    branches: [main]
+on: [push, pull_request, workflow_dispatch]
 
 permissions: {}