[Feature]: Fix textual notation for membership (usage of qualified name)

[antoineatstariongroup]

What type of issue is this?

• Bug report
• Feature request

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

TextualNotation : missing implementation for the notes about importedMembership (as described in the KerML specification, section 8.2.3.5)

Steps to Reproduce

System Configuration

• SysML2.NET version:
• Environment (Operating system, version and so on):
• .NET Framework version:
• Additional information: