Build all five G15 packages and add native Gitea push CI

.github/workflows/debian.yml

@@ -1,5 +1,7 @@
 name: Debian 13 packages
 on:
+  push:
+    branches: [main]
   pull_request:
     paths:
       - 'packaging/**'
@@ -12,6 +14,7 @@ on:
       - 'libg15render'
       - 'g15daemon'
       - 'g15macro'
+      - 'g15stats'
   workflow_dispatch:
   release:
     types: [published]