Finish adding implicit operators for all the Result<T1, T2, etc.> to Result<T1, T2, T3, etc.> conversions

[DamianEdwards]

Really feels like I should be code-genning these...

[DamianEdwards]

Now I've thought about it for 15 mins I think this is far easier than I realized. I can just implement a single implicit operator on each Results<T> class that accepts ResultsBase. That should be all that's needed.

[DamianEdwards]

Yeah that doesn't work, can't have user-defined operators that use interfaces or base classes 😞