fix(www): analytics bento code snippet is not readable

[unrenamed]

What does this PR do?

• [x] Adds hover effect to analytics bento removing gradient background
• [x] Makes copy code button sticky to top-right corner
• [x] Implements independent vertical scrolls for language switcher and code editor

Fixes #2216

ℹ️ The screenshots below show the updated (top) version of the Realtime Analytics bento and the previous version (bottom) on the landing page.

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] Chore (refactoring code, technical debt, workflow improvements)
• [ ] Enhancement (small improvements)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

How should this be tested?

• Test A
  • Go to http://go.unkey.com
  • Scroll to the Realtime Analytics section
  • Click Show API Code
  • Ensure the code editor is not fully visible and readable on mouse hover
  • Ensure the code editor has an independent vertical scroll so that the entire code can be viewed
  • Ensure the copy button is sticky

Checklist

Required

• [x] Filled out the "How to test" section in this PR
• [x] Read Contributing Guide
• [x] Self-reviewed my own code
• [ ] Commented on my code in hard-to-understand areas
• [ ] Ran pnpm build
• [x] Ran pnpm fmt
• [ ] Checked for warnings, there are none
• [ ] Removed all console.logs
• [x] Merged the latest changes from main onto my branch with git pull origin main
• [x] My changes don't cause any responsiveness issues

Appreciated

• [x] If a UI change was made: Added a screen recording or screenshots to this PR
• [ ] Updated the Unkey Docs if changes were necessary

Summary by CodeRabbit

• New Features

  • Introduced a CopyCodeSnippetButton for easier code copying.
  • Enhanced LanguageSwitcher for improved styling and overflow management.

• Improvements

  • Updated layout and styling of the AnalyticsBento component for a better user experience.
  • Added flexibility in styling through a new className prop in the BentoText function.