Updated all instances of the loading prop to isLoading across Button and
related components. This improves readability and ensures consistency in
the codebase.
The button size attribute was removed accidentally in this PR
https://github.com/twentyhq/twenty/pull/10536, I'm putting it back.
All the buttons were 32px instead of 24px for the small ones.
Added an accent prop to the StyledButtonWrapper for additional styling
capabilities. Also disabled pointer events on ButtonIcon to prevent
interference during loading states.
