API - woocommerce_currency should return separate field for symbol

[mikejolley]

When using the wc-api to get general settings /wc/v2/settings/general, the woocommerce_currency object has an options array that has the following format:

{AED: "United Arab Emirates dirham (د.إ)"}

This results in having to use a regex to separate the country and currency name from the currency symbol.

I propose that the options object should take this format:

{ AED: { country: "United Arab Emirates", currency: "dirham", symbol: "د.إ" } }

It may be good to look into a data endpoint instead/in addition, since this is a setting, not a way to get the correct symbol.

From woocommerce/woocommerce#15101

[belcherj]

When showing a dropdown in settings a user may not want to show the full country plus the symbol. Calling a second endpoint to get just the symbols seems needless. Breaking out the data into fields makes the API more flexible.