[Saiop68]

Adds BetterQueue next to Bottleneck in the API section.

It's a distributed rate limiter and job queue for Node.js where the queue state lives in Redis rather than in the process. Practical differences from Bottleneck:

• Cheap limiters. A limiter is a thin handle, so 1000 limiters cost roughly what 10 do.
• Jobs survive a crash. Another process picks up work a dead worker was holding.
• Cross-process priority. Ordering is computed server-side, so it holds across the whole fleet.
• Delayed jobs. scheduleAt() for work that needs to happen later.

The repo includes a benchmark that runs both libraries in separate processes against the same Redis: with 1000 limiters and 51,000 jobs, RSS after the run was 415 MB for Bottleneck and 222 MB for BetterQueue, and throughput was 9,957/s vs 11,456/s.

MIT licensed, TypeScript, 37 tests with CI on Node 18/20/22.