Added check system for all slash-commands

Blocks command execution during startup-routine, providing an explanation to the user
Removed leftover comment in about.py

src/cogs/debug.py

@@ -2,6 +2,8 @@ import discord
 from discord import app_commands
 from discord.ext import commands
 from cogs.base_cog import Base_Cog
+from cogs.maintenance import Maintenance_Command
+
 import logging
 from utils.portal import Portal
 from datetime import datetime
@@ -14,6 +16,7 @@ class Debug_Command(Base_Cog):
         super().__init__(logging.getLogger("cmds.debug"))
 
     @app_commands.command(name = "debug", description = "Provides debug informations about the bot, useful for troubleshooting")
+    @app_commands.check(Maintenance_Command.handle_check)
     @log_command_execution
     async def debug(self, ctx:discord.Interaction):
         portal:Portal = Portal.instance()