Fix Packaging the Khoj Desktop Apps (#289)

* Add langchain static files and pytorch metadata to Khoj native app

* Add pillow static files, metadata & hidden imports to Khoj native app

* Fix path to web interface static files on Khoj native app

* Add tiktoken hidden imports to make chat work from Khoj native app

* Fix Khoj native app to run with GUI mode enabled

This got broken when we moved from using the --no-gui flag to using
--gui in https://github.com/khoj-ai/khoj/pull/263

src/khoj/main.py

@@ -172,5 +172,10 @@ class ServerThread(QThread):
         start_server(self.app, self.host, self.port, self.socket)
 
 
-if __name__ == "__main__":
+def run_gui():
+    sys.argv += ["--gui"]
     run()
+
+
+if __name__ == "__main__":
+    run_gui()