Add ci/cd project creation form

What does this MR do and why?

Warning

These changes are behind the new_project_creation_form feature flag. They won't be available to users until all the work is done. See the plan here #514700 (closed)

References

Issue -> #567833

Epic -> &19232

Screenshots or screen recordings

CleanShot_2025-10-28_at_14.23.56_2x

How to set up and validate locally

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