onSearchFocus event

[LucasBourgeois]

Is your feature request related to a problem? Please describe.
If we're integrating the static emojiKeyboard in an element like a bottomSheet, we can't control surrounding UI when focusing the searchBar. So when focusing the searchbar, i can't expand the bottom sheet to give more space.

Describe the solution you'd like
Add a onSearchFocus event to run a function when focusing the searchbar

Describe alternatives you've considered
Adding multiple events like onSearchBlur, onCategoryChange, onSearch (to control search string state changes) events would be usefull