wiki: sync Mixins for V1.18.0 — drop MixinMapGenStructure (#131), add FML missing-deps mixins, refresh descriptions
Mixins page auto-generated from code (296 mixins + javadoc descriptions); retire stale Optimizations/Tweaks/Fixe pages
Config-File: document the MixinConfigResolver system (categories + disabled/forceEnabled), replacing the stale per-mixin-boolean line
Updated Optimizations (markdown)
Updated Fixe (markdown)
Updated Tweaks (markdown)