Return found types as an array

[Dreamescaper]

In some cases I need to process found types, and using CustomHandler is not sufficient.

Acceptance Criteria:

1. When method with ScanForTypes attribute returns Type[] or IEnumerable, and Handler is not specified - we return collection of found types (use collection expressions in return).
2. When method with ScanForTypes attribute returns TResponse[] or IEnumerable, and Handler method returns TResponse (i.e. somehow maps found T type to TResponse type) - we return collection of found types mapped by Handler (use collection expressions in return).
3. If Handler return type does not correspond to collection return type - report error.
4. It is only supported for ScanForTypes attribute, not GenerateServiceRegistrations attribute.