Add Support for Custom Kit Icons -- FontAwesome

[kaoru093]

Add Support for Custom Kit Icons -- FontAwesome (available on version >=6.4.0)

• First: Download the custom PRO Kit that you or your team has created on FontAwesome
• Second: Copy the webfonts/custom-icons.ttf file and js/custom-icons.js file into lib/fonts/ folder, at the same level where you store the icons.json file.
• Last: run command ./configurator.sh on Mac or ./configurator.bat on Windows with arguments install-custom-kit or abbr. k