Tech debt: Include a README in our Nuget packages

[tippmar-nr]

Describe the story, please be clear on scope of the story.

We get warnings when publishing our Nuget packages because they don't include a README.

It looks like including our existing README would be pretty easy (or we could write one specific to each package without much effort).

https://devblogs.microsoft.com/nuget/add-a-readme-to-your-nuget-package/#add-a-readme-to-your-package

Acceptance Criteria

All Nuget packages include a README

Estimates

Please provide initial t-shirt size S