fix(cli): load .env from user's CWD when run as console script

load_dotenv() with no arguments walks up from site-packages instead
of the user's CWD, so the installed tradingagents console script
silently misses the project's .env. Pass find_dotenv(usecwd=True)
so the search starts from CWD; same treatment for .env.enterprise.

#726 #755 #612 #747 #743 #753 #729 #728 #751

main.py

@@ -1,10 +1,9 @@
 from tradingagents.graph.trading_graph import TradingAgentsGraph
 from tradingagents.default_config import DEFAULT_CONFIG
 
-from dotenv import load_dotenv
+from dotenv import find_dotenv, load_dotenv
 
-# Load environment variables from .env file
-load_dotenv()
+load_dotenv(find_dotenv(usecwd=True))
 
 # Create a custom config
 config = DEFAULT_CONFIG.copy()