Rapid prototyping of UI

[Robinlovelace]

Heads-up @dabreegster this is the the first version of test UI-generating code e3ff923 , super concise and easy-to-iterate and therefore good-for-prototyping. Feel free to reproduce it with the following command from the latest version of the main branch with the following command from the R command line. Should open a browser, let me know if it works/not if you want to play 'ui tycoon' (doesn't quite gamify the process but this kind of does) ; ) :

shiny::runApp("test_code/schemademo")