Add build command to Python/PHP clients and denote 'contract' (#1292)

* Add a build command to the Python and PHP clients
* Warn about changing inputs (since separate repos)

Author: wied03

.github/workflows/deploy.yaml

@@ -10,7 +10,7 @@ on:
       - main
   workflow_dispatch:
     inputs:
-      command:
+      command:  # be careful when editing these, fusionauth-app expects certain commands
         type: choice
         options:
           - build    # build only