[Add] derived classes (Specializations) to generated HTML docs

[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

Add a row in the "header" table of class below the Generalizations row called Specializations that contains the classes that are derived from the current class

Steps to Reproduce

NA

System Configuration

• SysML2.NET version:
  • SysML2.NET: 0.10.0