Enhance GitHub Actions with workflow_dispatch

Added workflow_dispatch event and input for Git ref.

Author: dheesen

.github/workflows/main.yml

@@ -5,11 +5,20 @@ on:
     branches:
       - main
 
+  workflow_dispatch:
+    inputs:
+      ref:
+        description: 'Git ref, workflow_dispatch'
+        required: false
+        default: ''
+
 jobs:
   build-and-selftest:
-    if: github.head_ref != 'gitlab-main'
+    if: github.event_name == 'workflow_dispatch' || github.head_ref != 'gitlab-main'
     runs-on: ubuntu-latest
 
+    environment: magento-playwright
+
     env:
       PLAYWRIGHT_BASE_URL: https://hyva-demo.elgentos.io/
       PLAYWRIGHT_PRODUCTION_URL: https://hyva-demo.elgentos.io/