feat(widget): Experience - add brand logo error msg

Close #1781

wowchemy/layouts/partials/widgets/experience.html

@@ -30,9 +30,10 @@
         <div class="card-body">
 
           {{- if .company_logo}}
+          {{- $svg_icon := resources.Get (printf "media/icons/brands/%s.svg" .company_logo) -}}
+          {{ if not $svg_icon }}{{ errorf "Brand logo not found at `media/icons/brands/%s.svg`" .company_logo }}{{end}}
           <div class="d-flex align-content-start">
             <div class="mr-2 mb-2">
-              {{- $svg_icon := resources.Get (printf "media/icons/brands/%s.svg" .company_logo) -}}
               {{- with .company_url}}<a href="{{.}}" target="_blank" rel="noopener">{{end -}}
               <img src="{{ $svg_icon.RelPermalink }}" width="56px" height="56px" alt="{{.company | plainify}}">
               {{- with .company_url}}</a>{{end -}}