iOS + Web MIDI Browser support

[maizy]

relates:

• https://github.com/leafo/sightreading.training/issues/8

• https://github.com/leafo/sightreading.training/pull/49

• [x] macOS dev support

• [x] serverless dev server

• [x] fix midi device detection in Web MIDI Browser

• [x] fix for note range selectors in staff trainer

  • press to label "min"/"max" instead of selector

[maizy]

PR: #6

[maizy]

PR: https://github.com/maizy/sightreading.training/pull/8