widgets/simple_calendar_with_events library

1. ethiopiandatepickerandconvertor package
2. documentation
3. widgets/simple_calendar_with_events.dart

ethiopiandatepickerandconvertor package

1. Libraries
2. const/app_strings
3. const/enums
4. const/lib_colors
5. const/lib_fonts
6. const/lib_functions
7. const/ui_helper
8. ethiopiandatepickerandconvertor
9. utils/date_converter
10. utils/date_input_formatter
11. utils/ethiopian_date_helper
12. widgets/ethiopian_time_viewer
13. widgets/simple_calendar_with_events
14. widgets/simple_date_picker