chore: adapt theme to new template system (#696)

* Adapted theme's layout to [Hugo v0.146.0](https://gohugo.io/templates/new-templatesystem-overview/)
* Bumped minimal Hugo version to v0.146.0

layouts/_markup/render-blockquote-alert.html

@@ -0,0 +1,9 @@
+{{- if not (in (slice "note" "tip" "important" "warning" "caution") .AlertType) -}}
+  {{- warnf "Alert type %s is not supported" .AlertType -}}
+{{- end -}}
+
+{{- $content := .Text -}}
+{{- $alertType := .AlertType -}}
+{{- $alertTitle := .AlertTitle -}}
+
+{{- partial "components/github-style-alert.html" (dict "content" $content "alertType" $alertType "alertTitle" $alertTitle) -}}

layouts/_markup/render-blockquote-regular.html

@@ -0,0 +1,3 @@
+<blockquote>
+  {{ .Text }}
+</blockquote>

layouts/_markup/render-codeblock-mermaid.html

@@ -0,0 +1,4 @@
+<pre class="mermaid hx:mt-6">
+  {{ .Inner | htmlEscape | safeHTML }}
+</pre>
+{{- .Page.Store.Set "hasMermaid" true -}}

layouts/_markup/render-codeblock.html

@@ -0,0 +1,13 @@
+{{- $class := .Attributes.class | default "" -}}
+{{- $filename := .Attributes.filename | default "" -}}
+{{- $base_url := .Attributes.base_url | default "" -}}
+{{- $lang := .Attributes.lang | default .Type -}}
+
+
+<div class="hextra-code-block hx:relative hx:mt-6 hx:first:mt-0 hx:group/code">
+  {{- partial "components/codeblock" (dict "filename" $filename "lang" $lang "base_url" $base_url "content" .Inner "options" .Options) -}}
+
+  {{- if or (eq site.Params.highlight.copy.enable nil) (site.Params.highlight.copy.enable) -}}
+    {{- partialCached "components/codeblock-copy-button" (dict "filename" $filename) $filename -}}
+  {{- end -}}
+</div>

layouts/_markup/render-heading.html

@@ -0,0 +1,8 @@
+<h{{ .Level }}>
+  {{- .Text | safeHTML -}}
+  {{- if gt .Level 1 -}}
+    <span class="hx:absolute hx:-mt-20" id="{{ .Anchor | safeURL }}"></span>
+    <a href="#{{ .Anchor | safeURL }}" class="subheading-anchor" aria-label="Permalink for this section"></a>
+  {{- end -}}
+</h{{ .Level }}>
+{{- /* Drop trailing newlines */ -}}

layouts/_markup/render-image.html

@@ -0,0 +1,43 @@
+{{- $alt := .PlainText | safeHTML -}}
+{{- $lazyLoading := .Page.Site.Params.enableImageLazyLoading | default true -}}
+{{- $dest := .Destination -}}
+{{- $url := urls.Parse $dest -}}
+
+{{- $isLocal := not $url.Scheme -}}
+{{- $isPage := and (eq .Page.Kind "page") (not .Page.BundleType) -}}
+{{- $startsWithSlash := hasPrefix $dest "/" -}}
+{{- $startsWithRelative := hasPrefix $dest "../" -}}
+
+{{- if and $dest $isLocal -}}
+  {{- if $startsWithSlash -}}
+    {{- with or (.PageInner.Resources.Get $url.Path) (resources.Get $url.Path) -}}
+      {{/* Images under assets directory */}}
+      {{- $query := cond $url.RawQuery (printf "?%s" $url.RawQuery) "" -}}
+      {{- $fragment := cond $url.Fragment (printf "#%s" $url.Fragment) "" -}}
+      {{- $dest = printf "%s%s%s" .RelPermalink $query $fragment -}}
+    {{- else -}}
+      {{/* Images under static directory */}}
+      {{- $dest = (relURL (strings.TrimPrefix "/" $dest)) -}}
+    {{- end -}}
+  {{- else if and $isPage (not $startsWithRelative) -}}
+    {{/* Images that are sibling to the individual page file */}}
+    {{ $dest = (printf "../%s" $dest) }}
+  {{- end -}}
+{{- end -}}
+
+{{- $attributes := "" -}}
+{{- range $key, $value := .Attributes -}}
+  {{- if $value -}}
+    {{- $pair := printf "%s=%q" $key ($value | transform.HTMLEscape) -}}
+    {{- $attributes = printf "%s %s" $attributes $pair -}}
+  {{- end -}}
+{{- end -}}
+
+{{- with .Title -}}
+  <figure>
+    <img src="{{ $dest | safeURL }}" title="{{ . }}" alt="{{ $alt }}" {{ $attributes | safeHTMLAttr }} {{ if $lazyLoading }}loading="lazy"{{ end }} />
+    <figcaption>{{ . }}</figcaption>
+  </figure>
+{{- else -}}
+  <img src="{{ $dest | safeURL }}" alt="{{ $alt }}" {{ $attributes | safeHTMLAttr }} {{ if $lazyLoading }}loading="lazy"{{ end }} />
+{{- end -}}

layouts/_markup/render-link.html

@@ -0,0 +1,16 @@
+{{- $dest := .Destination -}}
+{{- $url := urls.Parse $dest -}}
+
+{{- if and $dest (hasPrefix $dest "/") -}}
+  {{- with or (.PageInner.GetPage $url.Path) (.PageInner.Resources.Get $url.Path) (resources.Get $url.Path) -}}
+    {{- $query := cond $url.RawQuery (printf "?%s" $url.RawQuery) "" -}}
+    {{- $fragment := cond $url.Fragment (printf "#%s" $url.Fragment) "" -}}
+    {{- $dest = printf "%s%s%s" .RelPermalink $query $fragment -}}
+  {{- else -}}
+    {{- $dest = (relURL (strings.TrimPrefix "/" $dest)) -}}
+  {{- end -}}
+{{- end -}}
+    
+{{- with . -}}
+  <a href="{{ $dest | safeURL }}" {{ with .Title }}title="{{ . }}"{{ end }}{{ if strings.HasPrefix .Destination "http" }}target="_blank" rel="noopener"{{ end }}>{{ .Text | safeHTML }}</a>
+{{- end -}}

layouts/_markup/render-passthrough.html

@@ -0,0 +1,9 @@
+{{- $opts := dict "output" "htmlAndMathml" "displayMode" (eq .Type "block") }}
+{{- with try (transform.ToMath .Inner $opts) }}
+  {{- with .Err }}
+    {{ errorf "Unable to render mathematical markup to HTML using the transform.ToMath function. The KaTeX display engine threw the following error: %s: see %s." . $.Position }}
+  {{- else }}
+    {{- .Value }}
+    {{- $.Page.Store.Set "hasMath" true }}
+  {{- end }}
+{{- end -}}