As a user of the Codex Library, I would like to have access to the LESS mixins available within the repository, so that I can easily solve problems CSS problems.

Example

The use of a custom input with a Menu component requires some specific border-bottom being applied to the custom input. This exists in the form of a mixin. Likewise, the use of an Icon within a text field also has a mixin to handle its placement

• 1. Acceptance criteria
• Add rules to vite build so that it "copies" the LESS mixin folder in the dist folder.
• Change all "menu" docs examples to use the available mixin (search for TODO(T308124) )

1. NOTE: if we do not want to do this task, we should remove the "TODO(T308124) " comment in the code