Rename "Menu" to "MenuItem"

[maxmamis]

The name Menu is confusing — it sounds like a screenful of options. Most classes/protocols/etc in Yoshi ending with the word "Menu" actually represent individual menu items, I.E. cells. YoshiGenericMenu should be YoshiGenericMenuItem, etc.

[maxmamis]

The existence of YoshiTableViewMenu complicates things, because it already has an associated protocol called YoshiTableViewMenuItem. On the other hand, that name itself is confusing, because it's a very specific kind of table view (allowing you to select one of several options) and that's not reflected by the name — in fact, it being a table view is really just an implementation detail, not the primary characteristic. Here's what I propose:

YoshiTableViewMenu becomes YoshiPickerMenuItem
YoshiTableViewMenuItem becomes YoshiPickerOption

[ghvg1313]

These names are somewhat inherited from 1.0 and gets expanded, for backward-compatibility concern the name will stay the same in the foreseeable future, we may change the name in the next major breaking update.