refactor templates layout

@see https://gohugo.io/templates/new-templatesystem-overview/

layouts/_partials/cv/organisation/get-num-of-items.html

@@ -0,0 +1,38 @@
+<!--
+    Return the number of a certain type of items an organisation has.
+
+    @params sc  Site context.
+    @params section_title   Title of the sub-section to show (e.g. "Blog Posts").
+    @params organisation_titles `dict` of organsation titles for this org and all of its children.
+-->
+
+{{- $sc := .sc -}}
+{{- $section_title := .section_title -}}
+{{- $organisation_titles := .organisation_titles -}}
+
+{{- $icon := dict
+    "Roles" "🔨"
+    "Blog Posts" "📌"
+    "Web Sites" "✉"
+    "Programs" "P"
+    "Writings" "🖉"
+    "Audiovisuals" "AV"
+    "Others" "?"
+    "Qualifications" "Q"
+    "Awards" "A"
+    "Appearances" "ME"
+-}}
+
+{{- $section_items := default
+    ( where ( where $sc.Site.Pages "Section" "blog" ) "Parent.Title" $section_title )
+    ( default
+        ( where ( where $sc.Site.Pages "Section" "cv" ) "Parent.Title" $section_title )
+        ( where ( where $sc.Site.Pages "Section" "portfolio" ) "Parent.Title" $section_title )
+    )
+-}}
+
+{{- $organisation_items := where $section_items ".Params.organisations" "intersect" $organisation_titles -}}
+<span class="organisations-table__items-icon{{- if ( eq ( len $organisation_items ) 0 ) }} organisations-table__items-icon--none{{- end -}}">
+{{- index $icon $section_title -}} <br>
+{{- ( len $organisation_items ) -}}
+</span>