title: New field types in Gentics Mesh schema
body: <p>I'd like to add custom field types like 'email' or other strings that could use regex validation.  </p>
  
  <p>Also, numeric fields with validation like &lt; or > or formatting like money.  </p>
  
  <p>I was thinking about storing a mapping of schema uuid + field name + field type, and have the UI query a new rest api to get the validation and formatting criteria when editing a node?  </p>
  
  <p>Does that sound like a good approach? or is there a better one?  </p>
  
  <p>I'm new to mesh, so I'm still learning how to approach customizations.  </p>
  
  <p>Thanks!</p>