[Medium] Make language extensions filterable in article creator

[polubis]

Context

Right now we have a select with displayed list of supported language types in our articles creator page. We want to make it a filterable list - so, instead of select there should be an input and after typing, you should have filtered languages displayed.

Definition of done

1. UI looks like before, just instead of clickable select, you have input with the same menu.
2. If there is no results after filter operation - display message in menu - "No results".
3. User is able to use Tab to navigate to next language, and enter to confirm it.
4. After confirm the choosen value is added to text field.

NOTE: It may require from you to write totally new component - filterable-input or something like that.