Is it possible to introduce special emoji lang-tag: und-Zsye

[d-desiatkin]

More details could be found on the link bellow:
https://chromium.googlesource.com/chromium/src/+/main/third_party/blink/renderer/platform/fonts/LocaleInFonts.md

Emojis
If we've determined that a character is [emoji-default](https://unicode.org/reports/tr51/#Presentation_Style), also known as “emoji in emoji” representation, we treat the character a bit differently. The goal is to not only find a font that supports emojis, but also to prioritize color emoji fonts over traditional monochrome fonts that happen to have the glyph.

On Android/Skia, Linux, and Windows, Blink will pass the special locale und-Zsye to the operating system when looking for an emoji font. The [Zsye](https://unicode.org/reports/tr51/#Emoji_Script) script tag is defined by UTS #51 as “prefer emoji style for characters that have both text and emoji styles available”, which is precisely what we need.

On Linux, Blink will additionally always use U+1F46A FAMILY (👪) when matching potential candidates to increase the odds of finding the right emoji font, in case the installed emoji font doesn't support the actual emoji in question.

https://unicode.org/reports/tr51/

File with emoji Unicode sequences can be generated from:
https://www.unicode.org/Public/16.0.0/ucd/emoji/emoji-data.txt