Empty project page follow up

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What does this MR do and why?

This MR is a follow-up to !159887 (merged) and addresses two points:

• #474187 (closed) in 49fda38b
• A mistake I did in !159887 (merged) where I forgot to remove commands that are not directly copy-pastable, such as cd existing_folder, defeating the purpose of the refactor. I addressed that in 232e6acd by removing these commands and precising in the text above that the commands need to be executed in the corresponding folder / Git project.

References

Follow-up of !159887 (merged) that was addressing #469513 (closed)

And fix of #474187 (closed)

Screenshots or screen recordings

Before	After

How to set up and validate locally

Create new project (without adding a README), see the changes in the interface of the empty project, profit

CC @psjakubowska @msedlakjakubowski that were front / UI reviewers for the previous PR

CC @stingrayza @slejeune FYI