feat(db): Add AsyncDatabase instance and backward compatibility alias

Author: siqnole

utils/db.py

@@ -1837,3 +1837,9 @@ def get_stats(self, guild_id: int):
         except Exception as e:
             self.logger.error(f"Error getting stats: {e}")
             return {}
+
+# Create an instance of AsyncDatabase to be imported elsewhere
+async_db = AsyncDatabase.get_instance()
+
+# Add a 'db' alias for backward compatibility
+db = async_db