feat(sentry): integrate Sentry SDK with Next.js and configure DSN

- Added Sentry client, server, and edge configurations for enhanced error monitoring.
- Updated `.env.example` and `docker-compose` to include `NEXT_PUBLIC_SENTRY_DSN`.
- Modified `next.config.ts` to use `withSentryConfig` for source map uploads.
- Installed `@sentry/nextjs` as a dependency and updated `pnpm-lock.yaml`.

docker-compose.prod.yml

@@ -134,6 +134,7 @@ services:
       NEXT_PUBLIC_API_URL: ${NEXT_PUBLIC_API_URL:-https://api.memegoat.fr}
       NEXT_PUBLIC_APP_URL: ${NEXT_PUBLIC_APP_URL:-https://memegoat.fr}
       NEXT_PUBLIC_CONTACT_EMAIL: ${MAIL_FROM:-noreply@memegoat.fr}
+      NEXT_PUBLIC_SENTRY_DSN: ${NEXT_PUBLIC_SENTRY_DSN}
     depends_on:
       - backend