Refactor the code to make it comply with PEP-8 standards:Convert all class definitions to CamelCase style.

(issue 37)

src/aios_kernel/role.py

@@ -1,22 +1,22 @@
-from .agent import ai_agent
+from .agent import AIAgent
 
-class ai_role:
+class AIRole:
     def __init__(self) -> None:
         self.agent_instance_id : str = None
         self.role_name : str = None
-        self.agent : ai_agent = None
+        self.agent : AIAgent = None
         self.introduce : str = None
 
     def load_from_config(self,config:dict) -> bool:
         pass
-    
+
     def get_intro(self) -> str:
         return self.introduce
 
     def get_name(self) -> str:
         return self.role_name
     
-class ai_role_group:
+class AIRoleGroup:
     def __init__(self) -> None:
         self.roles : dict[str,str]= None
         pass