Fixed AutomaticallyEquatable Object Recursion

[albertbori]

This PR introduces a fix to AutomaticallyEquatable which allows objects with recursive relationship to be compared for equality. It relies on referential equality to prevent recursion while still comparing all members of reference types if referential equality fails.

Other Additions

• Added unit tests to ensure the functionality of several recursive reference scenarios
• Added unit tests to ensure Error <-> objc NSError auto-conversion properties don't cause recursion problems
• Prevented intentional example unit test failure from breaking (future support for) CI builds
• Updated documentation to remove the warning about recursive relationships