minor changes
bug fixes
final features

- added sample data from json file
- ui changes to home view
- changes to transaction model

categories view:
- visual changes to listtile
- changes to edit category view
   >  name of class
   >  visual changes
   >  added selectable colors
   >  added selectable icons
- changes to details view
   >  minor visual changes
   >  chart data comes from transactions
- changes to app scaffold
   >  minor changes to fab
- changes to how categories are initialized in locator

TRIED bcs it not working, fixi dixi tomorrow, wenn ich nicht vergessen hab wie das alles funktioniert und was ich mir dabei gedacht hab

ability to add and edit transaction
- transactions are now read from hive and saved to hive

- swipe to delete
- edit
- fixed bug where the category would be the same across listtiles

fixed a bug where the onboarding would also be displayed on the second visit

both are initialized in the main function