Feature Request: Add additional data in header

[WardenCommander]

Hello, I would like to request an option or if it's already possible to add additional data to the header of the email, like schemas. In my opinion, it would require that editor recognize the script tag and move content into the header or an additional custom header component. example of schemas: https://developers.google.com/gmail/markup/reference https://developers.google.com/gmail/markup/reference/hotel-reservation#json-ld