Some docs were using design tokens and classes that were not theme
compliant, rendering ugly colors when switching to dark, it needed to
be aligned. Also update some code example to match the new format.
Fonts were de-facto included in the bundled dist/style.css file which
wasn't convenient in situations were consumers wanted to import fonts
by themselves.
Updated various parts of existing documentations to make a clean path
to learn how to install the library. I let the most complicated part in
the tokens's README.md file, which is referenced from the Storybook.
These were the missing parts in order to use every design tokens
of Cunningham. Including: spacing, font weight, size, family, and
colors. In order to be really versatile and to allow users to
define new design tokens I had to re-organize the way those tokens
are sub divided in sub objects in cunningham.ts file. That's why
sub division are created for theme.typ.sizes for instance.
