Create new python file for handling sqlalchemy. Removes circular import.

cogs/commands/data_management.py

@@ -9,7 +9,7 @@ from nextcord.ext import commands
 from sqlalchemy import distinct, select
 
 # pylint: disable=import-error
-from highscores import Category, CategoryGroup, Guild, Score, session
+from utilities.sql_alchemy_connection import Category, CategoryGroup, Guild, Score, session
 from utilities.utils import (
     autofill_categories,
     autofill_groups,