refactor: migrate page visibility control from Params.hidden to the new build.list parameter. (#1249)

* refactor: migrate page visibility control from `Params.hidden` to the new `build.list` parameter.

* Rename rss.xml to home.rss.xml

layouts/archives.html

@@ -16,9 +16,8 @@
     </header>
 
     {{ $pages := where .Site.RegularPages "Type" "in" .Site.Params.mainSections }}
-    {{ $filtered := where $pages "Params.hidden" "!=" true }}
 
-    {{ range $filtered.GroupByDate "2006" }}
+    {{ range $pages.GroupByDate "2006" }}
     {{ $id := lower (replace .Key " " "-") }}
     <div class="archives-group" id="{{ $id }}">
         <h2 class="archives-date section-title"><a href="{{ $.RelPermalink }}#{{ $id }}">{{ .Key }}</a></h2>