Option URIs in the JSON API

[Zack-83]

Rationale / Begründung

Similarly to #506, it would be helpful to add URIs at all locations where a RDMO object references another one.

Examples:

/api/v1/options/optionsets/ --> URIs for options, conditions, questions /api/v1/options/options/ --> URIs for optionsets, conditions /api/v1/domain/attributes/ --> URIs for parent attributes /api/v1/conditions/conditions/ --> URIs for pages, questionsets, questions, tasks, target_options /api/v1/questions/catalogs/ --> URIs for sections /api/v1/questions/sections/ --> URIs for catalogs, pages /api/v1/questions/pages/ --> URIs for sections, questionsets, questions /api/v1/questions/questionsets/--> URIs for pages, parents, questionsets, questions /api/v1/questions/questions/ --> URIs for pages, questionsets

Affected

Who is affected by the change: Managers, Admins, creators of plugins (for troubleshooting)