WIP: experiemntal vite support

[Yukaii]

• node 18

TODOs

• [x] slide stylesheet ordering
• [x] production build
• markdown rendering checks
  • [ ] markdown-lint
  • [ ] markdown-it-imgsize plugin patch
  • [ ] gist-embed

related

• https://github.com/vitejs/vite/issues/6375
• https://github.com/rollup/rollup/issues/3888
• https://github.com/evanw/esbuild/issues/399