Implement new Concept Exercise: options

Hello, I was planning to try adding concept exercise for Option<T>
I’ve checked GitHub issue it is free to take.
I think I can use the name-badge exercise from other tracks as the base for Option:

I think it fits nicely.
It would be good as addition to add a record type to exercise, to show that it is possible to use Option in types also.

Is it OK? Any other suggestions?

That sounds good!