Create a DRY Fonts module that centralizes all font definitions and
generates @font-face declarations dynamically based on typography preset.
- Add Fonts module with typography font mappings
- Generate @font-face CSS in CSSGenerator based on active preset
- Add font preload links in shop_root layout for performance
- Remove hardcoded font-face declarations from CSS
This improves font loading performance by only loading fonts for the
active typography preset and preloading critical fonts.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
