add archived template and submission pages

app/controllers/templates_archived_submissions_controller.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class TemplatesArchivedSubmissionsController < ApplicationController
+  def show
+    @template = current_account.templates.find(params[:template_id])
+
+    @pagy, @submissions = pagy(@template.submissions.where.not(deleted_at: nil).preload(:submitters).order(id: :desc))
+  rescue ActiveRecord::RecordNotFound
+    redirect_to root_path
+  end
+end