Compatibility wrapper for SingleOptimizable and FunctionOptimizable

With make() now being effectively reimplemented by us, we have the option to add automatic wrappers for SingleOptimizable and FunctionOptimizable.

Thoughts about that:

• We need a Wrapper class for these interfaces. gymnasium.Wrapper no longer works since it will stop forwarding attribute access. That Wrapper will have to be designed carefully to avoid API breakage.
• What kind of wrappers are useful? Ideas:
  • auto-normalization
  • auto-flatten
  • auto-providing QoL features like context manager functions for objects that only implement the protocols and not the ABCs
• it must be possible to disable these features in make() and register()