Improve performance of serialization and deserialization

[samatstariongroup]

Prerequisites

• [x] I have written a descriptive issue title
• [x] I have verified that I am running the latest version of the ReqIFSharp
• [x] I have searched open and closed issues to ensure it has not already been reported

Description

Serialization can be improved by refactoring and removing the xmlSerializer and relying solely on the XmlWriter and XmlReader classes.

Steps to Reproduce

NA

System Configuration

• ReqIFSharp version:
  • [x] ReqIFSharp: 5.0.0-rc2