Add navigation bar, split charts in pages

android/gradle.properties

assets/translations/en.json

assets/translations/fr.json

fastlane/metadata/android/en-US/changelogs/22.txt

fastlane/metadata/android/fr-FR/changelogs/22.txt

lib/cubit/bottom_nav_cubit.dart

lib/main.dart

lib/ui/screens/discoveries_screen.dart

lib/ui/screens/home_screen.dart

lib/ui/screens/skeleton_screen.dart

lib/ui/screens/statistics_screen.dart

lib/ui/widgets/bottom_nav_bar.dart

lib/ui/widgets/charts/custom_bar_chart.dart

lib/ui/widgets/charts/custom_line_chart.dart

pubspec.lock

pubspec.yaml