* Move defineInterface to shared
* Split up utils into node and browser utils
* Move defineDisplay to shared
* Move defineLayout to shared
* Move defineModule to shared
* Add defineEndpoint and defineHook to define-extensions
* Expose define extension functions through extension-sdk
* Make route type of defineEndpoint more specific
* Simplify define extension functions
* Deduplicate types and local types definition
* Do not allow functional components in display handler
* Make interface options nullable
* Deduplicate extension types definition
* Fix utils/node exports
