feat(custom-fullscreen-element-addon): added custom fullscreen element addon

[ravindra-dyte]

Added custom fullscreen element addon. Passed targetElement will be full screened on click of full screen toggle.

Usage:

import CustomFullscreenElementAddOn from '@dytesdk/ui-kit-addons/custom-fullscreen-element';

const customFullScreenElementAddOn = new CustomFullscreenElementAddOn({
  targetElement: document.getElementById('root')
});

[linear]

WEB-3809 Full screen toggle custom element addon