Loader Plugins: Allow Access to Quilt Config

[anonymous123-code]

Quilt Config currently is initialized to late to be of any use for loader plugins, and loader plugins might need a config too. The main holdup seems to be that plugins (and by extension their configs) need to be able to be unloaded and reloaded, which might raise the need for a API to unload configs. (Or even doing so automatically, ideally)