add archived template and submission pages

app/controllers/templates_restore_controller.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class TemplatesRestoreController < ApplicationController
+  def create
+    template = current_account.templates.find(params[:template_id])
+
+    template.update!(deleted_at: nil)
+
+    redirect_to template_path(template), notice: 'Template has been unarchived'
+  end
+end