Add DDEV addon to docs

Thanks for this!

Yes, I agree with @markie here. We should have a section (hidden under a details tag) that retains the previous docs. Something like Alternatively, you can also configure it manually:.

What do you think?

> Yes, I agree with @markie here.

Sorry, I do not see any comments here from @markie. What did they say?

Oh, it's on the MR. I wonder why I didn't get a notification for that.

I did some more tweaking.

- return to single DDEV section after storybook
- use to include snippet for manually updating `.ddev/config.yaml`
- add note for other dockerized enviroment user

This should now include all previously given suggestions. Move to NR.