* Remove Storybook knobs
They are now fully replaced by controls
* Update Storybook to 6.4.9
* Add Storybook documentation and VSCode snippets
* Add VSCode snippets
* Convert stories from checkout packages and include them in Storybook
On the front-end, checkboxes with labels would look squished when the labels wrapped
on a second line. That was due to the flex container taking too much space for the label
as the checkbox minimum dimensions was set in `px` rather than `em`, making it work
differently depending on the relative font size.
Lucio Giannotta
Luigi Teschio
Mike Jolley