docs(wiki): align editor names with in-app Avalonia titles + 'de facto standard'
docs(wiki): add FE8 Skill Systems page (FE8U/FE8J sources) + link from Home & Editors Document the community Skill System sources used to unlock the Skill-System-gated FE8 editors (FE8 Spell Menu Extends, Skill editors, Item Effectiveness Rework): - FE8U: FireEmblemUniverse/SkillSystem_FE8 (canonical EA buildfile, v1.2.2) - FE8U: MokhaLeee/fe8u-cskillsys-kernel (modern C kernel, v3.3.0-LTS) - FE8J: ngmansion/FE8N (de-facto FE8J base, 20240225)