CaptainSeeker

## Summary Added a plugin for Valkey, including environment variables, default conf file, and a service Added Docs And Example Files Addresses #2153 ## How was it tested? - compile...

**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