multi module android demo for currency conversion using fixer API

1. App module : for simplicity holds the presentation layer and navigation logic
2. Core modules : holdes the shared logic and utils for each layer
3. Model module : holds the common dtos and classes for the app

MVI model view intent single activity architecture following the Data-Domain-Presentation clean architecture and the UDF unidirectional data flow pattern with repository pattern for data as a layer over different offline/online data sources

1. Constraint Layout for flexible relative positioning and sizing of views
2. Support for different English/Arabic local
3. Coroutines and flow for asynchronous operations (networking or data store operations)
4. data binding
5. Navigation component for handling transitions between fragments
6. Dagger-Hilt for dependency injection
7. Retrofit/okhttp for networking