configure dev containers

[joshkamm]

• check for updates in prefix discord about using pixi in a devcontainer
• Try using setup-pixi in a github action (the short python 3.11 action)
• Try using pixi in a dev container
• automatically enable vscode extensions
• I could try out a DOCKERFILE instead of just a devcontainer.json because that might be more transferable learning to running containers in an application HPC setting
• automatically add pytest tmp directory to vscode workspace when connecting to dev container
• look into DevPod