Go binding: Finish implementation of the LocalTime module

[michelchan]

Go binding: Finish implementation of the LocalTime module

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

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

The implementation should include all the functionality for LocalTime 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/