#6 list item functionality
Completed:
- ListItem basic class definition + functions Fields added
- 'static': nextItemId
- itemId
- startDate
- endDate
- priority
- itemTitle
- itemNotes
- isFlagged
- tags Fields are public scope with relevant setter functions. I also added some unit tests for the list item.
- Setup Compose Library
- you can build and run Main.kt