[Frontend] Implement search with debounced input

[jobbykings]

Summary

Add a global search bar with debounced input for searching courses, credentials, and profiles.

Details

• Create search input component with debounce (300ms)
• Implement search API integration
• Show search results in dropdown overlay
• Add keyboard navigation for results
• Highlight matching text in results
• Add recent searches and clear history

Labels

area: frontend, frontend, feature, enhancement, priority: medium

[Emmanuel-Ugochukwu1]

Hi i would like to work on this

[grantfox-oss]

🦊 GrantFox — @Emmanuel-Ugochukwu1 has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #194)
2. Your PR will be reviewed by the Epondia maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@Emmanuel-Ugochukwu1's PR #244 was approved and merged by @jobbykings.

🏆 @Emmanuel-Ugochukwu1: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (589 total points). Track your full progress on GrantFox.

👏 Great work, @Emmanuel-Ugochukwu1! Keep contributing to Epondia.