Add comprehensive library system for internationalization, logging,
formatting, and UI state management:
- ling: i18n library with translation keys, plural rules, and JSON serialization
- logr: logging system with levels, filters, history, and transports
- glob: number (numr), date (dati), currency (curr), and unit (unit) formatters
- actx: application context integrating all modules with Svelte 5 reactivity
- uiux: reactive UI state for theme, toasts, modals, menus, and breakpoints
Features:
- 247 passing tests across 4 test suites
- Svelte 5 runes ($state) for reactive context
- Lazy initialization for optional modules
- Type-safe configuration with TypeScript
- Locale-aware formatting using Intl APIs
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
