Custom tags

Hi,

all tags are listed in help popup to field Custom suffix (just hold mouse over the label) and in documentation.

Date is currently not supported, also there is not PHP file to override. You could add any special custom text by handling Copylink manually in template, means:
- switch off the plugin
- add js declaration with code simílar to code bellow

use Joomla\CMS\Factory;
use Joomla\CMS\HTML\HTMLHelper;
...

HTMLHelper::_('script', 'plg_n3tcopylink/copylink.min.js', ['version' => 'auto', 'relative' => true]);

     Factory::getDocument()->addScriptDeclaration("
       CopyLink.addEvent(window, 'load', function () {
         new CopyLink({
           container : document.body,
           handler : function () {
             return 'Whatever text';
           },
           minimalSelection: 100
         });
       });
     ");