Refactor: migrate tablet core data module to clients core data module and enhance debug capabilities

- Moved tablet-specific `core:data` code to `clients:core:data` for better modularization.
- Renamed packages from `tablet.core` to `client.core`.
- Introduced `isDebug` platform-specific implementation and `LoggerInitializer` for conditional logging.
- Added `dataModule` and `appModule` Koin DI modules for streamlined dependency injection.
- Updated Gradle build scripts to align with new structure and integrate `BuildKonfig` for API URL management.
- Adjusted `ComposeApp` configurations for enhanced debug and DI setup.