refactor: agents inherit logger from BaseAgent

Created a class `BaseAgent`, from which all agents inherit. They get
assigned a logger with a nice name (something like
`control_backend.agents.AgentName`).

The BDI core takes care of its own logger, as bdi is still a module.

ref: N25B-241

src/control_backend/agents/mock_agents/belief_text_mock.py

@@ -1,9 +1,12 @@
 import json
+
 from spade.agent import Agent
 from spade.behaviour import OneShotBehaviour
 from spade.message import Message
+
 from control_backend.core.config import settings
 
+
 class BeliefTextAgent(Agent):
     class SendOnceBehaviourBlfText(OneShotBehaviour):
         async def run(self):
@@ -12,7 +15,15 @@ class BeliefTextAgent(Agent):
             # Send multiple beliefs in one JSON payload
             payload = {
                 "type": "belief_extraction_text",
-                "beliefs": {"user_said": ["hello test","Can you help me?","stop talking to me","No","Pepper do a dance"]}     
+                "beliefs": {
+                    "user_said": [
+                        "hello test",
+                        "Can you help me?",
+                        "stop talking to me",
+                        "No",
+                        "Pepper do a dance",
+                    ]
+                },
             }
 
             msg = Message(to=to_jid)