feat: support camera commands on static maps

[lodev09]

Summary

Static maps previously ignored moveCamera and fitCoordinates (setEdgeInsets was already supported via #86). Ref methods now work in static mode like on a live map, minus animation (duration is ignored).

• iOS: moveCamera and fitCoordinates update the static camera and re-render the base map. fitCoordinates fits the bounds into the viewport minus edge insets minus padding, with asymmetric padding shifting the visible center like edge insets. Zoom is derived per provider via a new zoomForMapPointsPerPoint: hook (Google: pixel-based web mercator; Apple: inverse of LuggStaticFittedMapRect's span-based fit).
• iOS: the snapshot cache now keys on the provider's actual camera instead of the initial camera props, so command-driven re-renders don't poison initial-camera cache entries.
• Android: static moveCamera/fitCoordinates go through the static camera-target shift (lite mode misrenders setPadding), updating the stored camera so later setEdgeInsets stays consistent. Mercator math is extracted into shared helpers.
• Web: no changes needed - static mode keeps a live map with gestures disabled.

Type of Change

• New feature

Test Plan

• yarn tidy (typecheck, eslint, objclint, ktlint) passes
• Exercise moveCamera and fitCoordinates on a static map in the example app on both platforms, including with edgeInsets set and with fit padding

Screenshots / Videos

N/A

Checklist

• I tested on iOS
• I tested on Android
• I tested on Web
• I updated the documentation (if needed)

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