Add emoji design for flag from Catolonia

Add emoji for flag from Catalonia matching Icons8 contry flags emoji design: https://icons8.com/icon/set/country-flags/emoji Flag for Catalonia (ES-CT) is a valid Unicode sequence <U+1F3F4,U+E0065,U+E0073, U+E0063,U+E0074,U+E007F>, just like flags for England or Scotland, but it's not RGI. OpenMoji and other flags libraries have this flag. It's needed for representing Catalan language at language selector. You have a Public Domain licensed artwork at Wikipedia: https://en.wikipedia.org/wiki/Senyera#/media/File:Flag_of_Catalonia.svg