provide required directive for form fields

[S-Stephen]

Include the ability to provide the required directive to firm fields.

This will / should provide the rendering as required in the form ie

'my field *'

rather than

'my field'

[S-Stephen]

https://stackoverflow.com/questions/45498708

It looks likely that 'required' will have to be passed as an @Input argument or within an @input argumment object?!