improve: introduce isort for linting Python imports (#1983)

api/core/hosting_configuration.py

@@ -1,12 +1,11 @@
 import os
 from typing import Optional
 
-from flask import Flask
-from pydantic import BaseModel
-
 from core.entities.provider_entities import QuotaUnit, RestrictModel
 from core.model_runtime.entities.model_entities import ModelType
+from flask import Flask
 from models.provider import ProviderQuotaType
+from pydantic import BaseModel
 
 
 class HostingQuota(BaseModel):