Rewrite to Kotlin Multiplatform

[kotleni]

Rewriting already in progress, checkout multiplatform branch.

Finished features:

Feature	Android	iOS	Web
Map rendering	✅
Large screens support
Path tracing
Station information
Google Maps integration
Firebase analitics
Firebase remoteconfig
Localization
...

[kotleni]

The new map renderer works well for Android:

Implemented in pure compose multiplatform, theoretically should work on other platforms.

[kotleni]

iOS, as expected.

[kotleni]

And web.