[22191] Add tutorial on how to avoid fully-connected network in ROS 2 (backport #222)

[mergify]

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This is an automatic backport of pull request #222 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 108f0bd has failed:

On branch mergify/bp/humble/pr-222
Your branch is up to date with 'origin/humble'.

You are currently cherry-picking commit 108f0bd.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	new file:   docs/rst/figures/tutorials/cloud/fully_connected.svg
	new file:   docs/rst/tutorials/core/wifi/router_fully_connected/router_fully_connected.rst

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   docs/rst/tutorials/core/wifi/wifi_tutorials.rst

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally