Add support for iOS target

[opatry]

Description

Quick & dirty proof of concept of iOS target (using CMP, without SwiftUI).

Still a lot to do to validate and clean, in particular:

• Update licenses_ios.json following recent lib updates on main branch.
•  Adjust "force" parameter usage for iOS OAuth impl
• Double check auth flow impl
  • special care needed around warning an background task management
• KtorMonitorLogging UI
  • there are notifications, but clicking on it does nothing, how to display the UI?
• iOS build takes +6min… more than the double of the others 😱
  • only run it nighlty?
    • ✅ added nightly build
  • determine if it can be improved? (download of iOS SDK? caching?)
    • ❌ caching is either not properly done or is useless
    • ❌ tried building less (only the gradle part with linkDebugFrameworkIosSimulatorArm64 without xcodebuild, still roughly the same duration)

Downloading native dependencies (LLVM, sysroot etc). This is a one-time action performed only on the first run of the compiler.
Downloading dependency https://download.jetbrains.com/kotlin/native/resources/llvm/19-aarch64-macos/llvm-19-aarch64-macos-essentials-74.tar.gz to /Users/runner/.konan/dependencies/cache/llvm-19-aarch64-macos-essentials-74.tar.gz
Done.
Extracting dependency: /Users/runner/.konan/dependencies/cache/llvm-19-aarch64-macos-essentials-74.tar.gz into /Users/runner/.konan/dependencies
Downloading dependency https://download.jetbrains.com/kotlin/native/libffi-3.3-1-macos-arm64.tar.gz to /Users/runner/.konan/dependencies/cache/libffi-3.3-1-macos-arm64.tar.gz
Done.
Extracting dependency: /Users/runner/.konan/dependencies/cache/libffi-3.3-1-macos-arm64.tar.gz into /Users/runner/.konan/dependencies

Checklist

• I have read the CONTRIBUTING guide
• Code compiles correctly
• Created tests which fail without the change (if possible)
• All tests passing