Go binding: Finish implementation of the Result module

[michelchan]

Go binding: Finish implementation of the Result module

Item	Detail
Binding	Go
Module	Morphir.SDK.Result
Relevant Morphir.IR.SDK module	Morphir.IR.SDK.Result
Relevant morphir-jvm code	morphir.sdk.Result
Relevant Elm Module	Result

Provide a Go lang implementation of the Morphir.SDK.Result module for Morphir.SDK.

The implementation should include all the functionality for Result as well as tests (we are willing to have this split across PRs).

Please place it here: https://github.com/finos/morphir/tree/features/polyglot-morphir/corelib/go/morphir/sdk/