[Feature]: Implement AnnotatingElementExtensions

[samatstariongroup]

Prerequisites

• I have written a descriptive issue title
• I have verified that I am running the latest version of the SysML2.NET
• I have searched open and closed issues to ensure it has not already been reported

Description

The AnnotatingElementExtensions class in SysML2.NET/Extend/AnnotatingElementExtensions.cs contains 4 extension method(s) that compute derived properties for the IAnnotatingElement interface. These methods currently throw NotSupportedException and need to be implemented.

Checklist

• List<IElement> ComputeAnnotatedElement(this IAnnotatingElement)
• List<IAnnotation> ComputeAnnotation(this IAnnotatingElement)
• List<IAnnotation> ComputeOwnedAnnotatingRelationship(this IAnnotatingElement)
• IAnnotation ComputeOwningAnnotatingRelationship(this IAnnotatingElement)

System Configuration

• SysML2.NET version: 0.19.0
• Source file: SysML2.NET/Extend/AnnotatingElementExtensions.cs