feat: add analysis-only crypto asset mode

tradingagents/agents/utils/agent_states.py

@@ -49,6 +49,7 @@ class RiskDebateState(TypedDict):
 
 class AgentState(MessagesState):
     company_of_interest: Annotated[str, "Company that we are interested in trading"]
+    asset_type: Annotated[str, "Asset type under analysis such as stock or crypto"]
     trade_date: Annotated[str, "What date we are trading at"]
 
     sender: Annotated[str, "Agent that sent this message"]