feat: support custom order for experience

Close #1761

wowchemy/layouts/partials/widgets/experience.html

@@ -8,7 +8,9 @@
 
   {{ if $page.Params.experience }}
   {{ $exp_len := len $page.Params.experience }}
-  {{ range $idx, $key := sort $page.Params.experience ".date_start" "desc" }}
+
+  {{/* Default to user's custom order (as requested in #1761) as Hugo doesn't support multiple sorts on params. /*}}
+  {{ range $idx, $key := $page.Params.experience }}
   <div class="row experience">
     <!-- Timeline -->
     <div class="col-auto text-center flex-column d-none d-sm-flex">