[Feature]: Implement RequirementDefinitionExtensions

[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 RequirementDefinitionExtensions class in SysML2.NET/Extend/RequirementDefinitionExtensions.cs contains 7 extension method(s) that compute derived properties for the IRequirementDefinition interface. These methods currently throw NotSupportedException and need to be implemented.

Checklist

• List<IPartUsage> ComputeActorParameter(this IRequirementDefinition)
• List<IConstraintUsage> ComputeAssumedConstraint(this IRequirementDefinition)
• List<IConcernUsage> ComputeFramedConcern(this IRequirementDefinition)
• List<IConstraintUsage> ComputeRequiredConstraint(this IRequirementDefinition)
• List<IPartUsage> ComputeStakeholderParameter(this IRequirementDefinition)
• IUsage ComputeSubjectParameter(this IRequirementDefinition)
• List<string> ComputeText(this IRequirementDefinition)

System Configuration

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