fix: Issue with discord icon at the bottom left organization sub menu

[itzabhinavarya]

What does this PR do?

This PR fix the issue no. #3320 . Need to update the Join Discord icon. For more brief details head over to the issue no. #3320

Fixes # (issue)

Required

• [x] Filled out the "How to test" section in this PR
• [x] Read How we Code at Formbricks
• [x] Self-reviewed my own code
• [x] Commented on my code in hard-to-understand bits
• [x] Ran pnpm build
• [x] Checked for warnings, there are none
• [x] 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
• [ ] First PR at Formbricks? Please sign the CLA! Without it we wont be able to merge it 🙏

Appreciated

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

Summary by CodeRabbit

• New Features

  • Introduced a new Discord icon in the Main Navigation for the "Join Discord" link.

• Enhancements

  • Improved type safety in the Ranking Question component by refining state initialization.
  • Enhanced validation logic and structure for survey-related types, including new types and validation functions to ensure survey integrity.

These updates enhance the user experience and ensure robust functionality across the application.