image/list: Add opt-in to --tree by default

[vvoland]

Add a new image-tree feature in ~/.docker/config.json which will make the docker image list use the new tree output by default.
The tree output is only used if no conflicting flag is passed (--format, --quiet, --digests, --no-trunc).

- Description for the changelog

`~/.docker/config.json` now supports an `image-tree` feature that will enable the new `image list` output by default whenever possible

[codecov-commenter]

Codecov Report

❌ Patch coverage is 28.57143% with 15 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
cli/command/image/list.go	28.57%	13 Missing and 2 partials ⚠️

📢 Thoughts on this report? Let us know!

[thaJeztah]

Hm, so my thinking with "enable by default" was to make the default a collapsed view of the tree-view, so that the columns stay the same (which is currently confusing, because without --tree you get different columns than with --tree); In that case, it would look something like this;

docker image ls
IMAGE ID DISK USAGE CONTENT SIZE IN USE
docker-cli-dev:latest 743475d9ae54 817MB 192MB ✔
myimage:latest d4ac66306dd9 16.5MB 7.64MB
docker-dev:latest fb53cf31af0f 2.23GB 580MB ✔
rpmbuild-fedora-41/arm64:latest 347239e5d412 1.53GB 356MB
debbuild-ubuntu-noble/arm64:latest 07141bca479f 1.45GB 360MB
debbuild-debian-bookworm/arm64:latest 1c00b1e78af9 1.74GB 461MB
docker:cli 1624879c3635 260MB 66MB
docker image ls --tree
IMAGE ID DISK USAGE CONTENT SIZE IN USE
docker-cli-dev:latest 743475d9ae54 817MB 192MB ✔
└─ linux/arm64 9431815c64e4 817MB 192MB ✔
myimage:latest d4ac66306dd9 16.5MB 7.64MB
├─ linux/arm64 ec5b4b1cef2d 12.8MB 3.99MB
└─ linux/amd64 2bf9e92542e1 3.65MB 3.65MB
docker-dev:latest fb53cf31af0f 2.23GB 580MB ✔
└─ linux/arm64 12a7c17e1b73 2.23GB 580MB ✔
rpmbuild-fedora-41/arm64:latest 347239e5d412 1.53GB 356MB
└─ linux/arm64 dd5275126098 1.53GB 356MB
debbuild-ubuntu-noble/arm64:latest 07141bca479f 1.45GB 360MB
└─ linux/arm64 032fb99f79b8 1.45GB 360MB
debbuild-debian-bookworm/arm64:latest 1c00b1e78af9 1.74GB 461MB
└─ linux/arm64 2b5c05517def 1.74GB 461MB
docker:cli 1624879c3635 260MB 66MB
├─ linux/amd64 e1b7fa9b2d15 0B 0B
├─ linux/arm/v6 67daf59d1ebd 0B 0B
├─ linux/arm/v7 ed7d82f74a17 0B 0B
└─ linux/arm64/v8 311320051fb1 260MB 66MB

[thaJeztah]

☝️ However, that's where the discussion about these two PRs comes at hand;

• sorting the images alphabetically, because we no longer show a CREATED column, so the current sort-order does not correlate with anything that's visible; image ls --tree: order images alphabetically #5561
• considering each image:tag an entry in the list; even if the image:tag corresponds with another image:tag that happens to be refering to the same manifest image ls: show each tag for an image as a separate entry #5556

[vvoland]

Hmm right, I'll put it as draft for now.