Support other disguise plugins

[PseudoKnight]

LibsDisguises, while a good disguise plugin, is premium and not open source -- though the code is at least available to read, thankfully. I'd like to support an open source disguise plugin. I'm not sure if this should be a full switch to one other plugin or support for multiple plugins. This depends on what my research finds on modern disguise plugins. Post here if you have any recommendations.

[PseudoKnight]

There's not a ton of candidates, unfortunately. There's maybe one or two candidate plugins, and they only have disguises for players. I think it might be better to have a separate extension for plugins with different feature sets.