docs: cdi isn't experimental

[ArthurFlag]

- What I did

Removed a note stating CDI is experimental. Closes docker/docs#22926.

- A picture of a cute animal (not mandatory but encouraged)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.82%. Comparing base (74a896f) to head (7e040d9).
Report is 8 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6162      +/-   ##
==========================================
- Coverage   54.83%   54.82%   -0.01%     
==========================================
  Files         364      364              
  Lines       30467    30467              
==========================================
- Hits        16706    16703       -3     
- Misses      12786    12789       +3     
  Partials      975      975              

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[thaJeztah]

Thank you for contributing! It appears your commit message is missing a DCO sign-off,
causing the DCO check to fail.

We require all commit messages to have a Signed-off-by line with your name
and e-mail (see "Sign your work"
in the CONTRIBUTING.md in this repository), which looks something like:

Signed-off-by: YourFirsName YourLastName <yourname@example.org>

There is no need to open a new pull request, but to fix this (and make CI pass),
you need to amend the commit(s) in this pull request, and "force push" the amended
commit.

Unfortunately, it's not possible to do so through GitHub's web UI, so this needs
to be done through the git commandline.

You can find some instructions in the output of the DCO check (which can be found
in the "checks" tab on this pull request), as well as in the Moby contributing guide.

Steps to do so "roughly" come down to:

1. Set your name and e-mail in git's configuration:

   git config --global user.name "YourFirstName YourLastName"
   git config --global user.email "yourname@example.org"

   (Make sure to use your real name (not your GitHub username/handle) and e-mail)

2. Clone your fork locally

3. Check out the branch associated with this pull request

4. Sign-off and amend the existing commit(s)

   git commit --amend --no-edit --signoff

   If your pull request contains multiple commits, either squash the commits (if
   needed) or sign-off each individual commit.

5. Force push your branch to GitHub (using the --force or --force-with-lease flags) to update the pull request.

Sorry for the hassle (I wish GitHub would make this a bit easier to do), and let me know if you need help or more detailed instructions!

[thaJeztah]

(sorry for the canned reply above; saves me some writing 😂)

Thanks! I think there's some more changes needed.

Perhaps we should consider removing the NOTE for this, and describe it as part of the body text; there's at least two notes near each-other now, and too many notes adds noise, and reduces their relevance.

For the daemon, we should update the description for the daemon config.
https://github.com/docker/cli/blob/84038691220e7ba3329a177e4e3357b4ee0e3a52/docs/reference/dockerd.md#enable-cdi-devices

• It currently uses a heading how to enable CDI, but now that it's enabled by default, we should probably consider using a heading like "Configure CDI devices"
• That section to describe the customizations that can be made (which mostly is configuring custom locations)
• ☝️ we should still mention the defaults, and mention what happens when configuring custom locations (are the added to the defaults, or replace the defaults?)
• 👉 steps could outline how to verify if the config took effect (I don't recall from the top of my head if we allow re-configuring without restarting the daemon (SIGHUP / systemctl reload docker))

The current example shows how to enable CDI;

  "features": {
     "cdi": true
  }

We kept support for the option to disable CDI for situations where it's not desirable (moby/moby#49963)

• so we could add a sub-header describing how to disable CDI support
• possibly a short mention that it's enabled by default since Docker Engine 28.3.0 (although probably we should have some description how to verify if CDI is supported (from docker info)).

 CDI spec directories:
  /etc/cdi
  /var/run/cdi
 Discovered Devices:
  cdi: docker.com/gpu=webgpu

[ArthurFlag]

Thanks for the extra info, @thaJeztah 🙇 I edited the other docs you pointed me to, let me know if that works with you.

[thaJeztah]

LGTM, thanks!!