Api update for entry points

[Kashif-E]

This pull request includes multiple changes to improve the documentation, refactor theme management, and update dependencies. The most important changes include adding a "Buy me a coffee" section to the README.MD, refactoring the theme management from ThemeManager to WrapperManager, and updating the usage of the Voyant function across various files.

Documentation Updates:

• README.MD: Added a "Buy me a coffee" section to the documentation.

Refactoring Theme Management:

• common/src/commonMain/kotlin/com/kashif/voyant_common/MaterialThemeContext.kt: Removed the ThemeManager class.
• common/src/commonMain/kotlin/com/kashif/voyant_common/WrapperManager.kt: Introduced WrapperManager to handle theme and wrapper management.

Code Updates:

• composeApp/src/commonMain/kotlin/com/kashif/sample/App.kt: Updated the App composable to use the new VoyagerNavigation function and added a toggle button to switch between Compose and Voyager navigation.
• composeApp/src/commonMain/kotlin/com/kashif/sample/compose/EntryPoint.kt: Wrapped NavHost with the Voyant function for theme management.
• composeApp/src/commonMain/kotlin/com/kashif/sample/voyager/EntryPoint.kt: Added the VoyagerNavigation function to encapsulate navigation setup.

Dependency Updates:

• composeApp/build.gradle.kts: Changed api dependencies to implementation for voyagerX and navigationComposeX projects.