refactor: implement twMerge

[patricio0312rev]

[extension] implement twMerge

Summary

• twMerge has been implement for components where there could be overlay between tailwind class names. (Basically reusable components with className prop, since other components have their class names predefined or just use cn for its variations)

Checklist

• I checked that both pnpm dev and pnpm dev:bare work as intended
• I checked the basic extension interactions and made sure wallet selection works
• I checked my UI changes against the design and there are no notable differences, including responsiveness
• I checked my (code) changes for obvious issues, debug statements and commented code
• I opened a corresponding card on Clickup for any remaining TODOs in my code
• I added a short description on how to test this PR (if necessary)
• Ready to be merged