Site builder enhancements

[sgammon]

Feature description

General list of enhancements we could add to the Static Site Builder:

• Assets System
  • Assets by reference
  • Absolute URLs to assets (globals + page-level)
  • Support for Google Fonts
• CSS & JS Pipeline
  • Bundle CSS on a per-page basis
  • Consider page-level JS as entrypoints
• Media
  • Conversion to WebP
  • Conversion to AVIF
  • Emit <picture> elements
• Browser Integration & DX
  • Better Chrome DevTools integration
  • Browser auto-reload