Add compose images command

[djdongjin]

The command prints images used by created containers in services (docker doc)

It supports --quiet and always truncates image ids (same as docker command).

I only prints size column and not blob size (or both) to be consistent with docker output. Please let me know if we want more columns.

A running example:

docker-compose.yaml

$ cat docker-compose.yml
version: '3.1'
services:
  svc0:
    image: alpine
    # restart: always
  svc1:
    image: alpine
    # restart: always
  svc2:
    image: nginx

# up one svc
$ sudo nerdctl compose up svc2 -d
...
$ sudo nerdctl compose images
Container                Repository    Tag       Image Id        Size
compose-images_svc2_1    nginx         latest    e209ac2f37c7    146.5 MiB

# up all svcs
$ sudo nerdctl compose up -d
...
# shows 3 images from 3 svc containers
$ sudo nerdctl compose images
Container                Repository    Tag       Image Id        Size
compose-images_svc0_1    alpine        latest    8914eb54f968    7.0 MiB
compose-images_svc1_1    alpine        latest    8914eb54f968    7.0 MiB
compose-images_svc2_1    nginx         latest    e209ac2f37c7    146.5 MiB
# shows 2 images ids because of dedup
$ sudo nerdctl compose images -q
8914eb54f968
e209ac2f37c7

# same output in docker compose
$ docker compose images
Container               Repository          Tag                 Image Id            Size
compose-images-svc0-1   alpine              latest              d3156fec8bcb        7.46MB
compose-images-svc1-1   alpine              latest              d3156fec8bcb        7.46MB
compose-images-svc2-1   nginx               latest              88736fe82739        142MB

Signed-off-by: Jin Dong jindon@amazon.com

[AkihiroSuda]

Thanks

[AkihiroSuda]

Needs rebase