Prepare README.md for OSS release

[brooke-hamilton]

Description
Review and update the README.md document in preparation for public consumption.

Acceptance Criteria

• Include product roadmap information
• Incorporate Getting Started information - probably a link to another markdown document
• Include the required text below

Trademarks This project may contain trademarks or logos for projects, products, or services. Authorized use of Microsoft trademarks or logos is subject to and must follow [Microsoft's Trademark & Brand Guidelines](https://www.microsoft.com/en-us/legal/intellectualproperty/trademarks/usage/general). Use of Microsoft trademarks or logos in modified versions of this project must not cause confusion or imply Microsoft sponsorship. Any use of third-party trademarks or logos are subject to those third-party's policies.