Allow JSON formatting of output to display assignment feedback
I added a few small changes
- added testing to check json string is in the expected format
- hint is optional to display
- updated README to the hellojson example outlining structure of expected json string
- fixed drop down bug
This branch does not include the theme implementation so things to keep in mind when merging the two:
- the color scheme in default light mode should remain the same (keep highlighting of table)
Only thing I would like to eventually add is a hellojson example assignment, the one here is not up to date.