Update wiki to match current codebase
- Fix module path: github.com/mike-ward/go-gui → github.com/go-gui-org/go-gui
- Architecture: update package map with 7 new subpackages and 12 core subsystems
- Add missing widgets: Rectangle, TextSelect, InputDate, MathSpinner, Form, Skeleton, Menu/MenuItem
- Add image validation helpers (ValidateImagePath, ValidateImageExtension)
- New Locales page covering i18n system, 10 presets, formatting helpers
- Advanced: add Inspector, Spell Check, Input Masks, System Tray, Titlebar, Rich Text, Font Management
- Graphics: enhance shader docs (BuildGLSLFragment, p0-p3), add Markdown math/Mermaid extensions
- Sidebar/Home: add Locales link, fix sibling project URLs
Co-Authored-By: Claude <noreply@anthropic.com>
Add complete wiki: all four phases across 19 pages
Phases 1-4: Home, Installation, Getting-Started, Architecture,
Widgets (all categories), Layouts, Events, Focus-and-Scrolling,
State-Management, Theming, Animations, Graphics, and Advanced.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>