fix: added cursor pointer to .btn class for better UX

[Nafisa-tamboli]

Added cursor: pointer; to the .btn class in _buttons.scss for consistent UX across browsers. Enhances accessibility and clarity of interactive elements.

[Nafisa-tamboli]

Hey maintainers! 👋
This PR adds cursor: pointer; to the .btn class in _buttons.scss to ensure all buttons consistently show the pointer cursor across browsers. Improves UX and interaction clarity, especially in custom setups.

Let me know if any changes are needed. Happy to contribute! 😊✨

[julien-deramond]

Thanks for your contribution, @Nafisa-tamboli. However, the Sass code provided in this PR is currently invalid. More importantly, the proposed change lacks context on the specific use cases it aims to address, especially since the existing implementation already works as expected in most browsers. For example, PRs like #41577 are designed to override this behavior only when necessary.