feat: Add GlitchTip error monitoring with Sentry SDK

- Install @sentry/nextjs
- Add sentry.client.config.ts, sentry.server.config.ts, sentry.edge.config.ts
- Conditional initialization based on GLITCHTIP_DSN env variable
- Add /api/glitchtip-tunnel route to bypass ad blockers
- Update next.config.mjs with withSentryConfig wrapper
- Integrate Sentry.captureException in error.tsx and global-error.tsx
- Support env vars: GLITCHTIP_DSN, NEXT_PUBLIC_GLITCHTIP_DSN, GLITCHTIP_URL, etc.

package.json

@@ -15,6 +15,7 @@
     "@ai-sdk/google": "^2.0.51",
     "@google/generative-ai": "^0.24.1",
     "@mistralai/mistralai": "^1.11.0",
+    "@sentry/nextjs": "^10.34.0",
     "@supabase/ssr": "^0.5.2",
     "@supabase/supabase-js": "^2.47.10",
     "@tanstack/react-query": "^5.62.7",