I want to add this script to my magento website"
<link rel="stylesheet" href="https://edu-kaspar.odoo.com/im_livechat/external_lib.css"/>
<script type="text/javascript" src="https://edu-kaspar.odoo.com/im_livechat/external_lib.js"></script>
<script type="text/javascript" src="https://edu-kaspar.odoo.com/im_livechat/loader/1"></script>"
please guide me how to do it?