refactor: Migrate the project functionality and optimize the code structure

py/config.py

@@ -0,0 +1,33 @@
+extension_uri: str = None
+model_base_paths: dict[str, list[str]] = {}
+
+
+setting_key = {
+    "api_key": {
+        "civitai": "ModelManager.APIKey.Civitai",
+        "huggingface": "ModelManager.APIKey.HuggingFace",
+    },
+    "download": {
+        "max_task_count": "ModelManager.Download.MaxTaskCount",
+    },
+}
+
+user_agent = "Mozilla/5.0 (iPad; CPU OS 12_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148"
+
+
+from server import PromptServer
+
+serverInstance = PromptServer.instance
+routes = serverInstance.routes
+
+
+class FakeRequest:
+    def __init__(self):
+        self.headers = {}
+
+
+class CustomException(BaseException):
+    def __init__(self, type: str, message: str = None) -> None:
+        self.type = type
+        self.message = message
+        super().__init__(message)