Development do workout screen and performance metrics

[MartinKoleff]

In this branch l have worked on:

• Login/Register enhancements
• ExerciseTimer UI
• ExerciseDataSheet, wiring with view model
• DoWorkout use cases
• DoWorkout tests
• WorkoutLocalDataSourceV2 and ExerciseDataSourceV2
• FakeDAOs refactoring to V2
• WorkoutConfiguration, wired with DoWorkoutLocalDataSource
• DoWorkoutPerformanceMetrics
• DoWorkoutPerformanceMetrics tests
• DoWorkoutExerciseSet
• Cross refs refactoring -> migrated to ForeignKey, refactored all data sources to not use cross refs and updated fake DAOs to do updated via listeners
• SavedStateHandle refactoring
• ExerciseDetailsConfigurator now in use
• Many bugs fixed