Implement the ResultList Module of the Morphir IR SDK

Is your feature request related to a problem? Please describe.
Morphir's SDK seeks to have parity with much of elm/core and should have full parity with elm/core ResultList.

Describe the solution you'd like
Implement the functions in [elm/core ResultList](https://github.com/finos/morphir-elm/blob/main/src/Morphir/IR/SDK/ResultList.elm) and add tests. Over time we will add more functionality here, but this is a good start.

Describe alternatives you've considered
N/A

Additional context
N/A

Start by reading the linked elm/core ResultList.elm implementation to identify the functions required for parity, then locate the corresponding ResultList module in this SDK. Add the functions and tests requested in the issue; done means the module covers the selected elm/core behavior and the tests pass.

Written by the indexing model from the issue text.