chore: 拆分app结构，将中间件、异常、子应用拆分成单独的模块

ruoyi-fastapi-backend/exceptions/handle.py

@@ -0,0 +1,27 @@
+from fastapi import Request
+from fastapi.exceptions import HTTPException
+from server import app
+from exceptions.auth_exception import AuthException
+from exceptions.permission_exception import PermissionException
+from utils.response_util import ResponseUtil, JSONResponse, jsonable_encoder
+
+
+# 自定义token检验异常
+@app.exception_handler(AuthException)
+async def auth_exception_handler(request: Request, exc: AuthException):
+    return ResponseUtil.unauthorized(data=exc.data, msg=exc.message)
+
+
+# 自定义权限检验异常
+@app.exception_handler(PermissionException)
+async def permission_exception_handler(request: Request, exc: PermissionException):
+    return ResponseUtil.forbidden(data=exc.data, msg=exc.message)
+
+
+# 处理其他http请求异常
+@app.exception_handler(HTTPException)
+async def http_exception_handler(request: Request, exc: HTTPException):
+    return JSONResponse(
+        content=jsonable_encoder({"code": exc.status_code, "msg": exc.detail}),
+        status_code=exc.status_code
+    )