📚[DOC]: Readme in the examples

[cfd1]

How would you describe the priority of this documentation request

Low (would be nice)

Is this for new documentation, or an update to existing docs?

New

Describe the incorrect/future/missing documentation

It would be useful to have a Readme in each of the examples explaining what they are. Problem description, setup etc.

If this is a correction, please provide a link to the incorrect documentation. If this is a new documentation request, please link to where you have looked.

Some of the examples are covered by the main docs