fix doc: copy `app-css.md` from `src/app.css`, add `--tw-empty: '';` in `html` block

feat: Add initial value to uiHelpers function

feat: card img can be rendered as snippet

feat: allow select size through selectSize attribute

Feat: add tabSize to tabs

Allow size on select

bugfix: remove backdrop if the backdrop variable is set to false

fix: navLi active text colour (dark)

fix: Bind input value to component value

fix: allow sidebar to have static positioning