Make sure all commands and flags are documented.

[hayleigh-dot-dev]

Glint gives us really nice auto-generated help text. We should make the most of it and make sure we have helpful descriptions for every command and any of its flags.

• [x] add esbuild
  • [x] --os
  • [x] --cpu
• [x] add tailwind
  • [x] --os
  • [x] --cpu
• [x] build app
  • [x] --minify
• [x] build component
  • [x] --minify
• [x] start
  • [x] --host
  • [x] --port
  • [x] --html
  • [x] --spa
  • [x] --use-example-styles