add liftiff layout

_layouts/liftoff.html

+---
+layout: default
+---
+{% if page.collectionpage %}
+  {% assign collectiondata = site.collections | where: "label", page.collectionpage | first %}
+  {% assign nofeature = collectiondata.nofeature %}
+{% elsif page.collection and page.collection != '' -%}
+  {% assign collectiondata = site.collections | where: "label", page.collection | first %}
+  {% assign nofeature = collectiondata.nofeature %}
+{% else %}
+  {% assign nofeature = page.nofeature %}
+{% endif %}
+<header class="header">
+{% include site-feature.html %}
+  <link rel="stylesheet" href="{{site.baseurl}}/assets/fontawesome-free-6.3.0-web/css/all.css" type='text/css'>
+  <link href='{{ site.url }}/assets/bootstrap/dist/css/bootstrap.min.css' rel='stylesheet'>
+  <script src='{{ site.url }}/assets/jquery-3.6.4.min.js'></script>
+  <script src='{{ site.url }}/assets/popper.min.js'></script>
+  <script src='{{ site.url }}/assets/bootstrap/dist/js/bootstrap.min.js'></script>
+</header>
+
+<main class="main  container">
+	<div class="content-up">
+		 <article class="article--page  typeset">
+
+	{{ content }}
+
+		</article>
+</div>
+
+
+</main>
+
+{% include site-footer.html %}
\ No newline at end of file