[BUG] Recursive types currently result in an endless loop.

[bauer-andreas]

Describe the bug

Currently creating a TypeInformation of a type will recurse into its properties without checking if the type was already encountered.
This is problematic for types like classes which may contain themselves.

Propose Solution

The TypeStore could be extended to resolve this problem, introducing references when parsing types which were already encountered.

Note: In the context of ApodiniOpenAPI, the OpenAPI exporter would probably need to ship support for Polymorphism. We countering such self references types (e.g. a tree) where no optionals are involved, you would typically introduce a terminating node in order to not get into an endless cycle. This would need to be documented.