feat: support partials

[uki00a]

• basic support (1b5e0be)
• support f-partial (daf9785)
• support form partials (1ac85bc)
• support <button> (14db5d5)
• support props.mode (f6737de)
• re-use SetupOptions.manifest as much as possible (67cdf1c)
  

  fresh-testing-library/components.ts

  Line 63 in 1b5e0be

  manifest?: Manifest;