feat: made program reset LLM

also added test_bdi_program_manager back cause
it was somehow missing in my files

ref: N25B-355

test/unit/agents/llm/test_llm_agent.py

@@ -134,3 +134,23 @@ def test_llm_instructions():
     text_def = instr_def.build_developer_instruction()
     assert "Norms to follow" in text_def
     assert "Goals to reach" in text_def
+
+
+@pytest.mark.asyncio
+async def test_clear_history_command(mock_settings):
+    """Test that the 'clear_history' message clears the agent's memory."""
+    # setup LLM to have some history
+    mock_settings.agent_settings.bdi_program_manager_name = "bdi_program_manager_agent"
+    agent = LLMAgent("llm_agent")
+    agent.history = [
+        {"role": "user", "content": "Old conversation context"},
+        {"role": "assistant", "content": "Old response"},
+    ]
+    assert len(agent.history) == 2
+    msg = InternalMessage(
+        to="llm_agent",
+        sender=mock_settings.agent_settings.bdi_program_manager_name,
+        body="clear_history",
+    )
+    await agent.handle_message(msg)
+    assert len(agent.history) == 0