Allow manually running builds

This enables manual in the repo as well as via gh cli runs. See https://cli.github.com/manual/gh_workflow_run

Author: kzu

.github/workflows/build.yml

@@ -3,6 +3,7 @@
 
 name: build
 on: 
+  workflow_dispatch:
   push:
     branches: [ main, dev, 'feature/*', 'rel/*' ]
     paths-ignore: