Docs: Add some messages flagging the upcoming requirement of a .readthedocs.yaml (#10389)
* Add some messages flagging the upcoming requirement of a .readthedocs.yaml
* Update docs/user/config-file/v1.rst
Co-authored-by: Eric Holscher <25510+ericholscher@users.noreply.github.com>
* Add more guidance
* warning box => paragraph text, rename section
* Update docs/user/tutorial/index.rst
Co-authored-by: Eric Holscher <25510+ericholscher@users.noreply.github.com>
* Hello darken my old friend, I've come to speak with you again
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Co-authored-by: Eric Holscher <25510+ericholscher@users.noreply.github.com>