[Feature]: Implement StateUsageExtensions

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

Checklist

• IActionUsage ComputeDoAction(this IStateUsage)
• IActionUsage ComputeEntryAction(this IStateUsage)
• IActionUsage ComputeExitAction(this IStateUsage)
• List<IBehavior> ComputeStateDefinition(this IStateUsage)
• bool ComputeIsSubstateUsageOperation(this IStateUsage, bool)

System Configuration

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