Go binding: Finish implementation of the LocalDate module

[michelchan]

Go binding: Finish implementation of the LocalDate module

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

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

The implementation should include all the functionality for LocalDate 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/