Detect devcontainer names decorator

[thediveo]

1. a devcontainer's container labels encompass devcontainer.config_file: this label's value specifies a path to the devcontainer.json from the perspective of the devcontainer's container engine.
2. the referenced config file in JSON format contains the .name field that specifies the, well, name of the dev container.

A devcontainer decorator thus could be able to retrieve the names of devcontainers and set them as "aliases"/user-facing names (as opposed to container IDs), overriding the Docker autogenerated devcontainer name. Alternatively, the UI rendering could render an additional devcontainer name property on top of the standard container name rendering.

[thediveo]

pot holes:

• devcontainer container labels (not image labels) seem to be implementation-specific with no spec covering them.
• needs JSOn parsing that is slow, just to get an id; albeit in case of Docker we have JSON API responses too to parse.