Add the NewFormClientSideComponentId and related properties to the ContentType model

[jansenbe]

Discussed in #1420

^{Originally posted by tomasz-sintel March 13, 2024}
When developing an SPFx form customizer, the component needs to be connected to the list via properties in the content type (reference).
Those properties (e.g. NewFormClientSideComponentId) are not available in the ContentType class.
Having to have some plug "on the side" in the form of a REST or PS script is not elegant.
My request is to add those properties to the ContentType class.

[jansenbe]

@tomasz-sintel: I've just pushed an update adding new fields to the IContentType interface. Give it a try and if things do not work for you please open a new issue with the details.

This update will be part of the next nightly build, closing this now