Add combine_page_and_site_title option

If true, it will e.g. change the title tag for the Legal page to
<title>Legal | Jane Doe - Nutrition Coach & Chef Consultant</title>

Signed-off-by: Daniel Holbach <daniel.holbach@gmail.com>

exampleSite/hugo.toml

@@ -63,6 +63,10 @@ enableEmoji = true
 
     # Options used for automatic image generation. see: https://gohugo.io/content-management/image-processing/
     image_options = "webp q90 lanczos photo"
+
+    # Use "page_title | site_title" for <title> tags
+    # e.g. <title>Legal | Jane Doe - Nutrition Coach & Chef Consultant</title>
+    combine_page_and_site_title = false
 
     [params.footer]
     # Show contact icons for email/phone (if specified) in the footer of the page

layouts/partials/head.html

@@ -1,9 +1,13 @@
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
 
+{{ if and site.Params.combine_page_and_site_title .Title .Site.Title }}
+<title>{{ .Title | plainify }} | {{ .Site.Title | plainify }}</title>
+{{ else }}
 {{ with or .Title .Site.Title | plainify }}
 <title>{{ . }}</title>
 {{ end }}
+{{ end }}
 
 {{ with resources.Get .Site.Params.favicon }}
   <link rel="shortcut icon" href="{{ .RelPermalink }}" type="{{ .MediaType.Type }}" />{{ end }}