[fix] unicode_emoji.h now compiles properly

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[Mishura4]

Does it btw (that would have been a problem before this PR as well)

[Mishura4]

Actually, all the variables will also need to be inline so as to not cause ODR violations if included in multiple TUs

[braindigitalis]

i will merge this and create a second PR off the back of this that fixes the invalid symbol names. - if everyone is in agreement?