modularize launch

TODO.md

@@ -16,4 +16,3 @@ Main ToDo list can be found at [GitHub projects](https://github.com/users/vladma
 - second pass: <https://github.com/vladmandic/automatic/issues/2783>  
 - control api  
 - masking api  
-- inpaint pan/zoom

launch.py

@@ -180,7 +180,8 @@ def start_server(immediate=True, server=None):
     return uvicorn, server
 
 
-if __name__ == "__main__":
+def main():
+    global args # pylint: disable=global-statement
     installer.ensure_base_requirements()
     init_args() # setup argparser and default folders
     installer.args = args
@@ -255,3 +256,7 @@ if __name__ == "__main__":
                 installer.log.info('Exiting...')
                 break
         time.sleep(1)
+
+
+if __name__ == "__main__":
+    main()