@shopify/name - custom name formatter should be selected from top-level locale

[trishrempel]

Overview

This line in src/formatName.ts selects a custom name formatter based on the locale passed in to formatName().

However, if the locale passed in is not top level or otherwise doesn't match this list exactly, the custom formatter will not be selected, and the name will instead be formatted as a Latin locale name.

Consuming repo

What repo were you working in when this issue occurred?

None - discovered while reading the code.

Suggested solution

Split locale by - (maybe use a regex to split by either - or _), and retain only the first portion when selecting the custom name formatter.

Update [the constant](this list) to only key by top-level locales (zh-CN and zh-TW are formatted the same anyways, so they can be replaced with zh).

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