added memgpt server command (#611)

* added memgpt server command

* added the option to specify a port (rest default 8283, ws default 8282)

* fixed import in test

* added agent saving on shutdown

* added basic locking mechanism (assumes only one server.py is running at the same time)

* remove 'STOP' from buffer when converting to list for the non-streaming POST resposne

* removed duplicate on_event (redundant to lifespan)

* added GET agents/memory route

* added GET agent config

* added GET server config

* added PUT route for modifying agent core memory

* refactored to put server loop in separate function called via main

tests/test_websocket_server.py

@@ -4,7 +4,7 @@ import json
 import websockets
 import pytest
 
-from memgpt.server.constants import DEFAULT_PORT
+from memgpt.server.constants import WS_DEFAULT_PORT
 from memgpt.server.ws_api.server import WebSocketServer
 from memgpt.config import AgentConfig
 
@@ -30,7 +30,7 @@ async def test_websocket_server():
     # )
     test_config = {}
 
-    uri = f"ws://{host}:{DEFAULT_PORT}"
+    uri = f"ws://{host}:{WS_DEFAULT_PORT}"
     try:
         async with websockets.connect(uri) as websocket:
             # Initialize the server with a test config