Added on_message event

src/modules_core/abc/module_service_abc.py

@@ -1,5 +1,6 @@
 from abc import ABC, abstractmethod
-from codecs import register
+
+import discord
 
 
 class ModuleServiceABC(ABC):
@@ -9,3 +10,6 @@ class ModuleServiceABC(ABC):
 
     @abstractmethod
     async def on_ready(self): pass
+    
+    @abstractmethod
+    async def on_message(self, message: discord.Message): pass