fix: move BDI core agent to make documentation generation better

Previously, the BDI Core Agent wasn't included in the docs.

ref: N25B-299

src/control_backend/agents/bdi/__init__.py

@@ -1,4 +1,5 @@
-from .bdi_core_agent.bdi_core_agent import BDICoreAgent as BDICoreAgent
+from control_backend.agents.bdi.bdi_core_agent import BDICoreAgent as BDICoreAgent
+
 from .belief_collector_agent import (
     BDIBeliefCollectorAgent as BDIBeliefCollectorAgent,
 )

src/control_backend/agents/llm/llm_agent.py

@@ -165,7 +165,7 @@ class LLMAgent(BaseAgent):
         :yield: Raw text tokens (deltas) from the SSE stream.
         :raises httpx.HTTPError: If the API returns a non-200 status.
         """
-        async with httpx.AsyncClient(timeout=None) as client:
+        async with httpx.AsyncClient() as client:
             async with client.stream(
                 "POST",
                 settings.llm_settings.local_llm_url,