Add Python server setup and dependencies installation

src-tauri/src-python/main.py

@@ -2,10 +2,15 @@ from fastapi import FastAPI, Header
 from fastapi.responses import StreamingResponse
 from llamacpp import LlamaItem, stream_chat_llamacpp
 from typing import Annotated, Union
+import uuid
 import os
 
 app = FastAPI()
 key_dir = os.path.join(os.getcwd(), "key.txt")
+if not os.path.exists(key_dir):
+    f = open(key_dir, 'w')
+    f.write(str(uuid.uuid4()))
+    f.close()
 f = open(key_dir, 'r')
 key = f.read()
 f.close()