[Feature]: Implement ExpressionExtensions

[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 ExpressionExtensions class in SysML2.NET/Extend/ExpressionExtensions.cs contains 3 extension method(s) that compute derived properties for the IExpression interface. These methods currently throw NotSupportedException and need to be implemented.

Checklist

• IFunction ComputeFunction(this IExpression)
• bool ComputeIsModelLevelEvaluable(this IExpression)
• IFeature ComputeResult(this IExpression)
• bool ComputeModelLevelEvaluableOperation(this IExpression, List<IFeature> visited)
• List<IElement> ComputeEvaluateOperation(this IExpression, IElement target)
• bool ComputeCheckConditionOperation(this IExpression, IElement target)

System Configuration

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