chore: add inline shortcode icon

* enable `enableInlineShortcodes` in config
* add markdown icon
* update hugo stats json
* clean up mermaid template

layouts/_default/_markup/render-codeblock-mermaid.html

@@ -2,4 +2,3 @@
   {{- .Inner | safeHTML -}}
 </pre>
 {{- .Page.Store.Set "hasMermaid" true -}}
-{{ warnf .Page.RelPermalink }}

layouts/shortcodes/icon.html

@@ -0,0 +1,12 @@
+{{- $icon := index site.Data.icons (.Get 0) -}}
+{{- $attributes := "height=1em"}}
+
+{{- if not $icon -}}
+  {{ errorf "icon %q not found" (.Get 0) }}
+{{- end -}}
+
+{{- $icon = replaceRE "<svg" (printf "<svg %s" $attributes) $icon -}}
+
+<span class="inline-block align-text-bottom icon">
+  {{- $icon | safeHTML -}}
+</span>