Proposed README.md file using standardized template

[riverma]

Purpose

• New README.md file format
• Leveraging https://nasa-ammos.github.io/slim/documentation/starter-kits/#software-project-template
• ⚠ NOTE: this is a DRAFT pull-request and it needs to be customized / adapted to your repo - please commit to this PR branch with your customizations before merging!
• ⚠ NOTE: make your modifications by searching for the string INSERT in the file and replacing with appropriate values for your repo
• ⚠ NOTE: read through the file thoroughly to ensure its well adapted for your repo and your scenario, feel free to modify as needed

  Proposed Changes

• [ADD/CHANGE] README.md file with sample content and format

  Testing

• For live example, see: https://github.com/riverma/unity-system-test/tree/riverma-readme