Add stats, feeds, scheduler, and guild backup features to the bot

- Introduced new models in the Prisma schema for statistics, social feeds, scheduled messages, and guild backups, enhancing the bot's functionality.
- Implemented command modules for managing stats channels, feeds, scheduling messages, and creating/restoring backups, improving user engagement and server management.
- Updated job handling to include dedicated workers for stats updates, feed polling, scheduling, and backup restoration, enhancing automation.
- Enhanced command localization for new features in both German and English.
- Documented the new features and their setup processes in PHASE-TRACKING.md for clarity on implementation steps.

.env.example

@@ -13,3 +13,5 @@ BACKUP_CRON=0 3 * * *
 BACKUP_DIR=/backups
 HEALTH_PORT=8080
 PUBLIC_BASE_URL=http://localhost:8080
+TWITCH_CLIENT_ID=
+TWITCH_CLIENT_SECRET=