Returns the name Twemoji files emoji under: its codepoints in hex, joined
with "-", without variation selectors (FE0F) unless the emoji is a ZWJ
sequence. lib/index-html.ts also uses it as the icon URLs' cache-busting
version.
Parameters
emoji: string
Return Type
string
Usage
import { emojiToCodepoint } from "api/lib/site-icons.ts";