UniMixins

Compat module:

• Made mixin errors and applied mixins get included in crash reports.

General:

• Overhauled config, it's now a property file (to avoid loading Forge config classes so early.)
• Added @Mod annotation to modules that were missing it. This fixes them not showing up in the mod list GUI and in crash reports.

Initial Modrinth release. Fully replaces SpongeMixins, MixinBooterLegacy, GasStation, GTNHMixins, and Mixingasm.