docs: add hugo site

Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>

docs/themes/hugo-geekdoc/layouts/_default/_markup/render-codeblock-mermaid.html

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+<!-- prettier-ignore-start -->
+{{ if not (.Page.Scratch.Get "mermaid") }}
+  <!-- Include mermaid only first time -->
+  <script defer src="{{ index (index .Page.Site.Data.assets "mermaid.js") "src" | relURL }}"></script>
+  {{ .Page.Scratch.Set "mermaid" true }}
+{{ end }}
+<!-- prettier-ignore-end -->
+
+<pre class="gdoc-mermaid mermaid text-center">
+  {{- .Inner -}}
+</pre>

docs/themes/hugo-geekdoc/layouts/_default/_markup/render-heading.html

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+{{- $showAnchor := (and (default true .Page.Params.geekdocAnchor) (default true .Page.Site.Params.geekdocAnchor)) -}}
+
+
+<!-- prettier-ignore-start -->
+{{- if $showAnchor -}}
+<div class="flex align-center gdoc-page__anchorwrap">
+    <h{{ .Level }} id="{{ .Anchor | safeURL }}" {{- with .Attributes.class }}
+        class="{{ . }}"
+    {{- end }}
+    >
+        {{ .Text | safeHTML }}
+    </h{{ .Level }}>
+    <a data-clipboard-text="{{ .Page.Permalink }}#{{ .Anchor | safeURL }}" class="gdoc-page__anchor clip flex align-center" title="{{ i18n "title_anchor_prefix" }} {{ .Text | safeHTML }}" aria-label="{{ i18n "title_anchor_prefix" }} {{ .Text | safeHTML }}" href="#{{ .Anchor | safeURL }}">
+        <svg class="gdoc-icon gdoc_link"><use xlink:href="#gdoc_link"></use></svg>
+    </a>
+</div>
+{{- else -}}
+<div class="gdoc-page__anchorwrap">
+    <h{{ .Level }} id="{{ .Anchor | safeURL }}" {{- with .Attributes.class }}
+        class="{{ . }}"
+    {{- end }}
+    >
+        {{ .Text | safeHTML }}
+    </h{{ .Level }}>
+</div>
+{{- end -}}
+<!-- prettier-ignore-end -->

docs/themes/hugo-geekdoc/layouts/_default/_markup/render-image.html

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+<img
+  src="{{ .Destination | safeURL }}"
+  alt="{{ .Text }}"
+  {{ with .Title }}title="{{ . }}"{{ end }}
+/>
+{{- /* Drop trailing newlines */ -}}

docs/themes/hugo-geekdoc/layouts/_default/_markup/render-link.html

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+{{- $raw := or (hasPrefix .Text "<img") (hasPrefix .Text "<figure") -}}
+{{- $code := hasPrefix .Text "<code" -}}
+<a
+  class="gdoc-markdown__link{{ if $raw -}}
+    --raw
+  {{- else if $code -}}
+    --code
+  {{- end }}"
+  href="{{ .Destination | safeURL }}"
+  {{- with .Title }}{{ printf "title=\"%s\"" . | safeHTMLAttr }}{{- end }}
+>
+  {{- .Text | safeHTML -}}
+</a>
+{{- /* Drop trailing newlines */ -}}