[Feature]: Implement RequirementUsageExtensions #174

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 RequirementUsageExtensions class in SysML2.NET/Extend/RequirementUsageExtensions.cs contains 8 extension method(s) that compute derived properties for the IRequirementUsage interface. These methods currently throw NotSupportedException and need to be implemented.

Checklist

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

System Configuration

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