Implement the Maybe 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 Maybe.

Describe the solution you'd like
Implement the functions in [elm/core Maybe](https://github.com/finos/morphir-elm/blob/main/src/Morphir/IR/SDK/Maybe.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 locating the Morphir .NET SDK's existing module implementations and test layout, then compare the requested behavior with src/Morphir/IR/SDK/Maybe.elm in the linked morphir-elm repository. Implement the Maybe functions supported by this SDK and add corresponding tests; done means the module has the requested elm/core parity covered by passing tests.

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