Added two samples and readmes

[sabotta]

No description provided.

[msftclas]

@sabotta,
Thanks for your contribution as a Microsoft full-time employee or intern. You do not need to sign a CLA.
Thanks,
Microsoft Pull Request Bot

[sabotta]

@jodebrui I've included the readmes this time along with the samples, using the readme templates. Can you approve this PR?

@jodebrui Would this root readme just include links?

[jodebrui]

Thanks. The readmes look good.
One further request:

• could you add a README.md to the root of the feature, i.e., data-migration-assistant, to point to the samples under the feature?

[sabotta]

@jodebrui I've added the root readme.md file

[sabotta]

#sign-off