M1: moon and planets widgets !5

Stacked on !4 (targets m1-today).

• SkyRenderer: public Path.moonLit and MoonDisc.

• Widget extension sh.krz.moonrise.widgets:

  • Moon: system small, Lock Screen circular and inline.
  • Planets tonight: system small and medium.
  • Hourly timeline for 12 h; last known location (NSWidgetWantsLocation) or Chicago; engine calls behind a lock.

Builds and embeds in the app for the iOS 27 simulator. Not visually checked: the simulator's widget gallery could not be opened by automation. swift test: 15 pass.