* Fixup TeamContext helper name
* Implement overload for GetAllMembers to take request parameter
* Update tests
* Implement Obersvable client changes
* Observable tests
* Implement AddOrEditMembership function returning a new response model, and obsolete the old AddMembership function returning an enum
* Implement GetMembershipDetails function returning new TeamMembershipDetails response model, and obsolete the old GetMembership function returning an enum
* Clarify that an exception is thrown when not a member
* Add integration tests for AddOrEditMembership and GetMembershipDetails
* fixup exception test for observable client
* Update wording of obsolete message
