/code-search updated CTA buttons

Created by: st0nebraker

Changelog

• Closes #5390 (closed)
• Reinstates CTA changes from #5318 (closed) that were wiped in the merge

Test

1. Ensure linting passes.
2. Ensure prettier has standardized the proposed changes.
3. Ensure dev and production builds work.
4. Nav to /code-search and ensure CTA's match the requirements