Draft: [Feat] Complete Task 1, 2 and 3
This Merge request aims to provide a solution for the Tasks 1, 2 and 3.
The App.java has adapted for easy testing of the additions.
There are minor deviations compared to the original Task:
- The
toJSON()
function now also always includes the ID of a given object. - The Date will always be output in the
DD.MM.YYYY
format.