Pull requests

## Checklist - [x] Appropriate tests were added - [ ] Any code changes were done in a way that does not break public API - [x] All documentation related to code changes were updated - [x] The new code follows the [contributor guidelines](ht

## Summary Initial implementation of the `ReservoirComputingBenchmarks` library in `lib/` as discussed in #398. Implements the first three core benchmark tasks: - **Memory Capacity** (Jaeger 2002) — linear memory evaluation with per-delay a