feat: add optional breadcrumb trail

assets/scss/layouts/_pages.scss

@@ -38,3 +38,8 @@ p.meta {
   margin-top: 0.5rem;
   font-size: $font-size-base;
 }
+
+.breadcrumb {
+  margin-top: 2.25rem;
+  font-size: $font-size-base;
+}

config/_default/params.toml

@@ -53,3 +53,4 @@ editPage = false
   flexSearch = true
   darkMode = true
   bootStrapJs = false
+  breadCrumb = false

layouts/docs/single.html

@@ -15,6 +15,15 @@
 		{{ else -}}
 		<main class="docs-content col-lg-11 col-xl-9 mx-xl-auto">
 		{{ end -}}
+			{{ if .Site.Params.options.breadCrumb -}}
+				<!-- https://discourse.gohugo.io/t/breadcrumb-navigation-for-highly-nested-content/27359/6 -->
+				<nav aria-label="breadcrumb">
+					<ol class="breadcrumb">
+						{{ partial "main/breadcrumb" . -}}
+						<li class="breadcrumb-item active" aria-current="page">{{ .Title }}</li>
+					</ol>
+				</nav>
+			{{ end }}
 			<h1>{{ .Title }}</h1>
 			<p class="lead">{{ .Params.lead | safeHTML }}</p>
 			{{ partial "main/headline-hash.html" .Content }}

layouts/partials/main/breadcrumb.html

@@ -0,0 +1,4 @@
+{{ with .Parent -}}
+  {{ partial "main/breadcrumb.html" . -}}
+  <li class="breadcrumb-item"><a href="{{ .Permalink }}">{{ if .IsHome }}Home{{ else }}{{ .Title }}{{ end }}</a></li>
+{{ end -}}