Add support for reusing validation on basic data types in the back office

[RachBreeze]

Example would be:
A URL Textbox that not only requires validation as a url, but the user must enter a certain URL.

If this text box is used in multiple areas, because it's not possible to set validation on a datatype, but only on the point you pick the datatype, it means each time a developer wants to reuse that validation they must re enter it when they select the textbox data type.

By allowing users to define validation on a data type, that data can then be reused without any additional validation needing to be added when the property is added to a document type