How can we improve WHMCS?

Referring to the additional domain fields of some TLDs, there is a need for registrar modules to have the ability to return a customized page for managing special fields related to the contacts or the domain.

To facilitate this, I propose the implementation of one of these new functions:
_getDomainContactsForm()
_getAdditionalFieldsForm().
These functions would be specific to each registrar module and would be called only for domains associated with that particular registrar.

The functions would generate a custom form layout for managing domain contact information into the contact domain data page.

Moreover, the submitted form data should be directed to the _SaveContactDetails() as usual, to ensure proper handling and storage of the updated contact/additionaldata details.

By incorporating these functionalities, registrar modules would have the flexibility to provide a tailored and seamless experience for managing domain contacts within WHMCS.