Fixes#382
Description of the changes:
Add Pyeong as an Area conversion unit.
Pyeong shows up only if the user's current region is Korea ( i.e. region is either KP or KR ).
Added Korean translation for Pyeong (평). For other locales, we default to English ( Pyeong ).
How changes were validated:
Manually tested the below
For non-Korean regions, Pyeong does not show up.
Korean region with Korean locale => Pyeong shows up and Pyeong is correctly translated.
pyeong_Korean
Korean region with English locale => Pyeong shows up and Pyeong is in English.
pyeong_English
Korean region with simplified Chinese locale => Pyeong shows up and Pyeong is in English.
pyeong_Chinese
853704c1c2