🛠 feat: Color skin tone filter

[FelipeFTN]

Skin tone selector is not working as expected.

Maybe building a new SQLite query for this function should work, then it will only query the emojis with the right skin tone or without any skin-tone (like objects perhaps).

[yob]

This would be super helpful. I recently switched from the abandoned gnome-emoji-selector and this is one of the few behaviour changes that feels a bit surprising - it takes more keypresses to select an emoji than previously:

[FelipeFTN]

Yeah, @yob, this is a bit of a complicated feature hahaha but It's still possible! 😅
I might start working on this next week! 🚀