feat: enhance gitignore and bot prefix handling

- Updated .gitignore to properly exclude Python cache files and environment variables
- Modified bot.py to improve prefix case handling for better command recognition
- Refactored mail.py to streamline feedback email generation and database interaction
- Added environment variable loading in mail.py for better configuration management

utils/bank_functions.py

@@ -4,7 +4,7 @@ from typing import Dict
 from datetime import datetime
 
 
-db = DatabaseManager("economy")
+db = DatabaseManager()
 
 
 async def create_account(user: discord.Member | discord.User):