feat | fix | breaking: updates CopilotSeatDetails[CopilotSeatDetails_organization > NullableOrganizationSimple], [CopilotSeatDetails_assignee > SimpleUser], fixes many previously unknown types, fixes check run discriminator to evaluate status, fixes content discriminator to evaluate type

feat | fix | breaking: updates CopilotSeatDetails[CopilotSeatDetails_organization > NullableOrganizationSimple], [CopilotSeatDetails_assignee > SimpleUser], fixes many previously unknown types, fixes check run discriminator to evaluate status, fixes content discriminator to evaluate type #16