Investigate: Improve management of Dev Containers

[alexdima]

When creating many dev containers using the "Create Dev Container..." command, it becomes difficult after a while to tell them apart. It would be nice to allow renaming them and to better support the user in cleaning them correctly (removing both a container and its volume).

cc @kieferrm

[chrmarti]

Adding a clean up command. Renaming is difficult because a container's metadata is readonly.