Add API Rate Limiting and Caching

[sammy200-ui]

The /api/live-streams endpoint in api.js directly calls the YouTube API without any caching or rate limiting. This could lead to quota exhaustion and slow response times.

Current Issues:

No caching mechanism for API responses
Direct API calls on every request
No rate limiting for client requests
Could hit YouTube API quota limits quickly

[yogaprasadk]

can u assign me i will contribute to this issue.

[sammy200-ui]

sure go ahead!!