[Plugin Request]: Valkey

**What is the name of the package you are requesting a plugin for?**
[Valkey](https://www.nixhub.io/packages/valkey)

**Does the package work today?**
Yes

### **Additional context**
- https://valkey.io/
- https://github.com/valkey-io/valkey
- https://www.nixhub.io/packages/valkey