fix: expose the unicode emoji builtin rules

[tomtau]

ref: #872

[huacnlee]

EMOJI, EMOJI_COMPONENT, EMOJI_MODIFIER, EMOJI_MODIFIER_BASE, EMOJI_PRESENTATION, EXTENDED_PICTOGRAPHIC where are you get this code?

In Pest, there have a script (update_unicode.sh) to generate the Unicode names.

[tomtau]

EMOJI, EMOJI_COMPONENT, EMOJI_MODIFIER, EMOJI_MODIFIER_BASE, EMOJI_PRESENTATION, EXTENDED_PICTOGRAPHIC where are you get this code?

In Pest, there have a script (update_unicode.sh) to generate the Unicode names.

from here: https://pest.rs/book/grammars/built-ins.html#binary-properties

[huacnlee]

Oh, never mind on my last comment.
You do the right way. The Emoji unicode script has been generated before, we just not publish in pest mod.rs