Tom C (DLS)

This should be ready to go

@evalott100

What I'd like reviewed most is the docs. Downlowd and unzip https://github.com/bluesky/ophyd/suites/8898144421/artifacts/407113849 then point a browser at it and look at the User Guide v2 tutorials and how-tos.

For some reason GitHub won't let me ask @tacaswell @whs92 and @callumforrester for a review...

A couple of tests that worked on 3.9 but don't work on 3.8, will look at this next week...

> > Since Channel Access PVs remain part of EPICS 7, change EPICS V3 PVs to EPICS Channel Access (V3) PVs > > The top half of the main index...

> We're also being asked to comment on code? Yes please, I was aware that people had limited time, so I wanted people to focus on docs and the example...

Converting to Draft until I've actioned all the comments...

I'd like to discuss these changes in the community call on Thursday, can people make it to that?

@ZLLentz and @prjemian I've simplified the process of making a `Device` by introducing a `SimpleDevice` helper class that does a lot of the boilerplate code for you. I also discussed...