[WIP] Support Regulatory Fusions

[acoffman]

This introduces schema support for regulatory fusions.

Still todo before this can be merged:

• modify algorithm for VICC compliant name to order partners based on which is the regulatory partner
• UI/client side mutation for creating regulatory fusions

We aren't using it directly yet but many of the regulatory fusion terms are SOID terms, so this also adds that linkage in case we want to leverage it in the future.