feat: Implemented map feature functions (i.e. GeoJSON support) #95

Job	Run time
setup / setup (ubuntu-22.04)	8s
setup / setup (macos-15)	10s
lint-test / lint	1m 5s
verify-packages / verify-web	40s
verify-packages / verify-android	2m 41s
verify-packages / verify-ios (/Applications/Xcode_16.4.app)	1m 22s
	6m 6s

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