Add helper function(s) to "split" `Logic`s and `LogicValue`s

### Motivation

Some common use cases:
- Split a bus into individual bits to be processed independently
- Split a bus into chunks of equal size (e.g. bytes)
- Split a bus into chunks of unequal size (e.g. decoding a header with various fields)

### Desired solution

A generic and powerful solution that applies to these and more cases would be ideal. It would be useful to have matching APIs for both `Logic` and `LogicValue`.

### Alternatives considered

_No response_

### Additional details

_No response_