use partials for data rows in organisation timelines

layouts/partials/cv/organisation/get_role_start_date.html

@@ -0,0 +1,17 @@
+<!--
+    Renders a role's start date.
+
+    @params .   Role start date.
+    @return Date
+-->
+
+<!-- Validation -->
+
+{{- if ( not ( eq (printf "%T" . ) "time.Time" ) ) -}}
+  {{- errorf "Start date is not a `time.Time`, it's a %T" . -}}
+{{- end -}}
+
+
+<!-- Rendering -->
+
+{{- return ( printf "new Date('%s')" ( .Format "2006-01-02" ) ) -}}