[FEATURE] Add APIs to support resource access management dashboard

[DarshitChanpura]

This feature requests addition of resource-access-management APIs to be consumed by dashboards. Specifically,

• /types API that lists available resource types
• /list?resource_type=<type> API that lists available resource for the selected type.

[cwperks]

[Triage] @DarshitChanpura when proposing new APIs, could you also include some lite API spec? i.e. route params, url params, examples of requests, responses and any boundary handling conditions?