[Feature Request] Add ability to disable commands

This feature request is related to a problem where I am running 2 discord bots with one token for different divisions, for example my Js script is running the moderation side while JMusicBot is running the music client. They have the same prefix, as they are the same bot, however when I run a command like ,ping I get two responses.

It would be beneficial to have a {prefix}disable {command} command, so people can choose what commands they want available in their server. For example, ,disable ping would disable the ping command etc etc.

Start by reviewing the command-handling entry point and how server-specific settings are stored; no file or test is named in the issue. The work is done when a server can use `{prefix}disable {command}` to prevent the selected command from responding, while other commands remain available.

Written by the indexing model from the issue text.