Using the SLIM template README

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
[CHANGE] README.md file with existing content but new format
Testing
For live example, see: https://github.com/unity-sds/unity-repo-template