feat: add SectionTitles parameter

The user can define a per section title in params, used in section pages. If none is defined, the default title is used.

Author: davlgd

layouts/partials/head.html

@@ -10,6 +10,10 @@
   <title>
     {{- if .IsHome -}}
       {{ .Site.Title -}}
+    {{ else if eq .Kind "page" - }}
+      {{ with .Title }}{{ . }} – {{ end -}}
+      {{ $sectionTitle := index .Site.Params.sectionsTitles .Section }}
+      {{ $sectionTitle | default .Site.Title }}
     {{ else -}}
       {{ with .Title }}{{ . }} – {{ end -}}
       {{ .Site.Title -}}