Add Manage subscription page

[MAILPOET-2677]

assets/js/src/settings/components/label.tsx

@@ -1,8 +1,8 @@
-import React from 'react';
+import React, { ReactNode } from 'react';
 
 type Props = {
   title: string
-  description: string
+  description: ReactNode
   htmlFor: string
 }