feat: handle gestures in flutter

[josxha]

Rationale

Handling the gestures in flutter gives some nice benefits and moves the package one step further away from just providing bindings in favor of creating a complete and consistent experience.

• drag of map annotations
• consistent cross platform experience
• macos support using platform views
• better integration with other gestures detected by flutter, e.g. on markers
• pave the way for a better test coverage

Gestures

Pan

• single pointer
• two pointer
• keyboard arrow keys

Zoom

• scroll wheel zoom
• double click
• double click drag
• click with two pointers: use pointer center
• two pointer: use pointer center

Rotate

• secondary pointer
• two pointers: rotate around pointer center
• ctrl key and pan

Tilt

• secondary pointer
• ctrl key and pan
• two pointer vertial pan

Other

• integrate with MapOptions gestures property
• disable browser context menu on web
• adjust with globe view on web
• adjust rotation logic when map is tilted
• update event system on web
• update event system on android
• update event system on ios

[codecov]

Codecov Report

❌ Patch coverage is 0% with 313 lines in your changes missing coverage. Please review.
✅ Project coverage is 23.70%. Comparing base (2b3f46c) to head (04bf6ba).

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