Add dev containers for all of our images

[knelli2]

Proposed changes

Makes opening the repo in the different containers significantly easier than having to edit a single dev container file every time.

Upgrade instructions

Code review checklist

• The code is documented and the documentation renders correctly. Run
  make doc to generate the documentation locally into BUILD_DIR/docs/html.
  Then open index.html.
• The code follows the stylistic and code quality guidelines listed in the
  code review guide.
• The PR lists upgrade instructions and is labeled bugfix or
  new feature if appropriate.

Further comments

[knelli2]

@nilsvu What do you think of these changes? I think they will be useful for SXS-con and also in general for people who want to use different containers to try things.

[nilsvu]

Yea seems useful, I'm only worried about maintaining all these files. I see some merge logic noted in the docs https://containers.dev/implementors/spec/, so is it possible to have the different files inherit most fields from a parent file?

[knelli2]

From a quick glance it looks like several fields we use are missing merge logic so we'd still have to copy a decent amount. Not sure if it's worth it to rely on merge logic.

[knelli2]

@knelli2 and @nilsvu will discuss more