Apply change to a mediawiki skin
<p>I'm working on a <code>mediawiki</code> project. I want to know if I can create a new skin (from scratch) for <code>mediawiki</code> using frameworks like <code>Bootstrap</code>, <code>Angular material</code>,...</p>

<p>or I had a limit when it's come to changing <code>mediawiki</code> skin (how much in percentage?)</p>