Adding sitemap

assets/scss/sitemap.scss

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+@import "_variables";
+
+urlset {
+  background-color: $background_accent_2;
+  url {
+    color: $font_default;
+    &:after {
+      content: '\a';
+      white-space: pre;
+    }
+    &:before {
+      content: '> ';
+      white-space: pre;
+    }
+  }
+}

content/sitemap.xml/contents.lr

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+_template: sitemap.xml
+---
+_model: none
+_discoverable: no

templates/sitemap.xml

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+<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet href="{{ 'css/sitemap.min.css'|asseturl }}" type="text/css" ?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+  {%- for page in [site.root] if page != this recursive %}
+    {%- if not page.hide_from_global_index %}
+  <url><loc>{{ page|url(external=true) }}</loc></url>
+  {{- loop(page.children) }}
+    {%- endif %}
+  {%- endfor %}
+</urlset>