ci: Run CI Workflow on push to main and allow to trigger it manually

.github/workflows/ci.yaml

@@ -1,8 +1,13 @@
 name: CI
 
 on:
+  # workflow_dispatch so that it can be triggered manually if needed
+  workflow_dispatch:
+
   pull_request:
     branches: [ main ]
+  push:
+    branches: [ main ]
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.number }}