Model addition timeline (#33762)
* Model addition timeline
* Link guide
* Update docs/source/en/add_new_model.md
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>
* Update docs/source/en/add_new_model.md
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>
* Review comments
* Add contact email
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Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>
