Feat: Adds tokens to SlideOver

[eduardoformiga]

What's the purpose of this pull request?

This PR applies the new Theming structure to SlideOver: new scoped tokens linked to global ones.

It also Adds CSS Modules to the CartSidebar, with themification tokens and Stories.

How does it work?

This PR uses local variables to parameterize the SlideOver, and CartSidebar properties, then connect these scoped tokens to the global ones.

Tokens can be visualized in the storybook.

How to test it?

• The SlideOver component and its related components should look just as it was before these changes.
• The CartSidebar component and its related components should look just as it was before these changes.
• You can check the story on Storybook.

Checklist

Changelog

• Added an entry in the CHANGELOG.md at the beginning of its due section. The latest version should comes first.
• Added the PR number with the PR link at the entry in the CHANGELOG.md. E.g., New items in the pull_request_template.md (#4)

PR Description

• Added a label according to the PR goal - Breaking change, Enhancement, Bug or Chore.
• Added the component, hook, or pathname in-between backticks (``) - If applicable. E.g., ComponentName component.
• Identified the function or parameter in the PR - If applicable. E.g., useWindowDimensions hook.

Documentation

• PR description
• Added to/Updated the Storybook - if applicable.
• For documentation changes, ping @ carolinamenezes, @ PedroAntunesCosta or @ Mariana-Caetano to review and update.

[renatamottam]

LGTM!