Multi-bit mux with (at least) 1-hot encoding option

### Motivation

If you have a 1-hot encoded selection, it is common to want to select something based on it. A mux that can select using a mult-bit index with a 1-hot encoding (perhaps other encodings as well?) would be helpful.

### Desired solution

A mux component that can select based on 1-hot encoding, and maybe more. Include useful APIs and extensions as necessary

### Alternatives considered

_No response_

### Additional details

_No response_