Return all valid option values for creating an ICP.
Call this endpoint first to discover the allowed values for each field
before calling /api/v1/icp/create.
Response fields:
employee_ranges when creating an ICP.min_funding and max_funding when creating an ICP.value (code) and
label (display name). Use the value field for location when creating an ICP.value (code) and
label (display name). Use the value field for sub_locations when creating an ICP.
Only applicable when location is exclusively ["us"].value field for people_locations when creating an ICP.value field for people_sub_locations when creating an ICP.
Only applicable when people_locations is exclusively ["us"].