Use case: !COMMAND eater.

When some plugin gets dynamically loaded/unloaded we have no way to identify what commands are added other than making a full commands enumeration with a significant CPU cycle loss. We don't even know when to do such enumeration, because no OnPluginLoaded() forward exists at all (second problem).

So, I suggest to add:

forward OnCommandRegistered(char[] name)

forward OnCommandUnregistered(char[] name)

making life much easy.

Thank you.