[EssentialsX-Discord] Allow slash commands to be used in direct messages

[untuned]

This would especially be useful for the /msg command, since replies are sent to your DMs anyway.

[Chew]

This is a Discord limitation. We upsert commands to the server specifically, which means they update in the client instantly. To allow this to happen, commands would need to be global, which take up to an hour to update.

[untuned]

In that case, it could be a configuration option? Most bots will only be in one server regardless.