feat: Upgrade to .NET 10 MAUI

[denischilik]

Background

Upgraded SDK from .NET 8 MAUI to .NET 10 MAUI to resolve XA4212 build error with AndroidX.Navigation.Compose on .NET 10 MAUI. This ensures compatibility with the latest MAUI framework version.

What Has Changed

• Updated target frameworks from net8.0-ios/net8.0-android to net10.0-ios/net10.0-android across all SDK and sample projects
• Updated .NET SDK version to 10.0.103 in global.json files
• Updated AndroidX and Kotlin dependencies to versions compatible with MAUI 10.0.20
• Updated build documentation to reflect new target framework names

Checklist

• I have performed a self-review of my own code.
• I have made corresponding changes to the documentation.
• I have added tests that prove my fix is effective or that my feature works.
• I have tested this locally.

Additional Notes

• Verified locally with both Android and iOS  versions of Sample App
• Resolved version conflicts with AndroidX dependencies (Fragment, Activity, Lifecycle, Collection, Kotlin libraries)
• All projects now consistently target .NET 10 MAUI frameworks