add archived template and submission pages

app/controllers/templates_archived_controller.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class TemplatesArchivedController < ApplicationController
+  def index
+    templates = current_account.templates.where.not(deleted_at: nil).preload(:author).order(id: :desc)
+
+    @pagy, @templates = pagy(templates, items: 12)
+  end
+end