feat: prompt 加载器的扩展性

pkg/provider/sysprompt/loader.py

@@ -1,13 +1,27 @@
 from __future__ import annotations
 import abc
+import typing
 
 from ...core import app
 from . import entities
 
 
+preregistered_loaders: list[typing.Type[PromptLoader]] = []
+
+def loader_class(name: str):
+
+    def decorator(cls: typing.Type[PromptLoader]) -> typing.Type[PromptLoader]:
+        cls.name = name
+        preregistered_loaders.append(cls)
+        return cls
+    
+    return decorator
+
+
 class PromptLoader(metaclass=abc.ABCMeta):
     """Prompt加载器抽象类
     """
+    name: str
 
     ap: app.Application