chore(hw): Reduce `Memory` boilerplate

[clabby]

Overview

In the Memory trait, we have separate get/set functions for byte, halfword, word, and doubleword accesses. All of the implementations are the same, barring the field size.

We should look to reduce this boilerplate a bit, and create a single get/set function for all access widths. num-traits would likely be the best way to do this, but unfortunately, it does not have const handles for a type's bit length, min value, or max value.