Implement the Comparable Module of the Morphir 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 StatefulApp.

Describe the solution you'd like
Implement the functions in [elm/core Comparable](https://github.com/finos/morphir-elm/blob/main/src/Morphir/SDK/Comparable.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 Comparable.elm implementation and then inspect the Morphir SDK structure for the corresponding F# module and existing test patterns. Implement the requested Comparable functions and add tests covering them; done means the module has the requested parity and the test suite passes.

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