rpm-ostree compose extensions should print the list of packages downloaded and the repos they come from

[jlebon]

Similarly to how rpm-ostree compose tree shows e.g.

[2023-04-05T17:30:32.601Z] Installing 512 packages:
[2023-04-05T17:30:32.601Z]   NetworkManager-1:1.42.2-1.el9.x86_64 (rhel-9.2-baseos)
[2023-04-05T17:30:32.601Z]   NetworkManager-cloud-setup-1:1.42.2-1.el9.x86_64 (rhel-9.2-appstream)
[2023-04-05T17:30:32.601Z]   NetworkManager-libnm-1:1.42.2-1.el9.x86_64 (rhel-9.2-baseos)
[2023-04-05T17:30:32.601Z]   NetworkManager-ovs-1:1.42.2-1.el9.x86_64 (rhel-9.2-appstream)
[2023-04-05T17:30:32.601Z]   NetworkManager-team-1:1.42.2-1.el9.x86_64 (rhel-9.2-baseos)
[2023-04-05T17:30:32.601Z]   NetworkManager-tui-1:1.42.2-1.el9.x86_64 (rhel-9.2-baseos)
[2023-04-05T17:30:32.601Z]   WALinuxAgent-udev-2.7.0.6-9.el9.noarch (rhel-9.2-appstream)
...

We should do the same for rpm-ostree compose extensions.