The more neutral folded_hands is the official name and should make
folks more confortable with using this for thank_you, which is
certainly a more common use in work contexts than pray.
This script pulls from our previously custom-written emoji strings
and fills in the rest from CLDR. It also removes 4 custom emoji which
collide with some of the new CLDR names (they will now just be called
by their CLDR name).
Emoji that we specifically choose names or aliases for will be
stored in this new file so that we can generate emoji_names.py
from the custom names and also CLDR (for the rest).
This new file isn't used for anything yet (no user facing change);
it will be used in future commits.