thws-ical

feat: Add a privacy policy page and link to it from the about page.

docs/fix: changed note about redis, as lib/redis.ts is not currently implented on main

docs: Clarify app's applicability to other universities in README.

docs: Update cache duration from 15 to 30 minutes and add notes on Redis provider and Vercel Analytics.

perf: Increase iCal feed CDN and Redis cache expiration to 30 minutes.