Add MapLibre cocoapods dependency

[josxha]

One of the design ideas maplibre followed was to have all in one package to simplify development, ci and releases. Unfortunally, the MapLibre cocoapods dependency has the same name as this package and podspec module_name is not supported. Related issue:

• Support podspec module_name to avoid name clash with native iOS frameworks flutter/flutter#63240
• Invalid Plugin Specification (flutter v1.20+) objectbox/objectbox-dart#112
• Depends on flutter tooling: better lib integration objectbox/objectbox-dart#114
• Flutter cannot build against ARM simulators (on ARM macOS host) flutter/flutter#64502
• https://docs.flutter.dev/add-to-app/ios/project-setup#apple-silicon-arm64-macs
• When plugins do not support ARM iOS simulators, the app fails to build flutter/flutter#85713
• Apple Silicon support maplibre/maplibre-native#4

It is currently unknown if the problem persists with the swift package manager.

Federated Plugin

One option would be to migrate the package into a full federated plugin.

Minimal iOS Package

An alternative to a full federated plugin could be to just separate the ios ffi code and keep the rest in the maplibre package.

[josxha]

I decided to create a minimal package that contains the native MapLibre iOS SDK and swift implementation. The core package will no longer have a iOS part itself but rely on maplibre_ios.