These are frontend changes.
Use Vue for the import feature UI for "githubish"
providers (GitHub and Gitea).
Add "Go to project" button after a successful import.
Use CI-style status icons and improve spacing of the
table and its component.
Adds ETag polling to the github and gitea import
jobs endpoint.
Users importing from Bitbucket Cloud, Bitbucket Server, or GitHub
often complained about getting failed imports due to 422 errors.
This change ensures that project names are imported with names that
are guaranteed to pass the regular expression validation.
Part of #50021
