[CI-3432] Updates font-family to use Inter

[Mudaafi]

Pull Request Checklist

Before you submit a pull request, please make sure you have to following:

• NA I have added or updated TypeScript types for my changes, ensuring they are compatible with the existing codebase.
• NA I have added JSDoc comments to my TypeScript definitions for improved documentation.
• NA I have added tests that prove my fix is effective or that my feature works.
• NA I have added any necessary documentation (if appropriate).
• I have made sure my PR is up-to-date with the main branch.

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no API changes)
• Documentation content changes
• TypeScript type definitions update
• Other... Please describe:

1. Adds the global stylesheet to every story
2. Adds a top-level css class to assign font-family to every component (we do this in quizzes-ui)
3. Remove unused Button component that was just lying there

TODO [Pre-launch]

1. Standardize file structure
   • Pagination
   • index.css/ts (Barrel File naming structure See RFC 21)
2. Remove css imports within each component. (Research story CI-3425)

[linear]

CI-3432 [MVP] PLP OS UI: InterFont

We use the Inter font in quizzes. We should use it here too

[esezen]

Do we need global here? Not a big deal I just wanted to check if we can make it consistent across repos. I think we have cio-quiz and cio-autocomplete

[Mudaafi]

I do like consistency

[esezen]

I left one small comment. Feel free to merge with or without it