Add list of available fields in response format

[tloubrieu-jpl]

As a user, I want to know which fields I can request to the API.

Acceptance criteria:
Check that the list of available field which can be requested can be pulled from the API. Check that in the documentation (https://nasa-pds.github.io/pds-api/) and in the reference implementation (https://github.com/NASA-PDS/registry-api-service) deployed on https://pds-gamma.jpl.nasa.gov/api/swagger-ui.html

[tloubrieu-jpl]

fields have been added in response summary

New summary-only option enable to only request the summary before requesting the data.

The default properties are not in the list.