Repository Structure and Enhancement Preparation

[jsquire]

Repository Structure

• Adding a code of conduct file, per GitHub recommendations
• Adding additional organization to pave the way for a non-.NET version.
• Separating Postman artifacts from API solution code for better sharing

README

• Updating format based on Markdown Lint feedback
• Fixing inconsistent capitalization
• Fixing a couple of minor typos

C# API

• Updates to packages to validate compilation after changes

[jsquire]

This has been rebased onto the current state. Conflicts clear.