Extend the existing NewSpaceDialog project flow so an optional host
folder becomes the space workspace root. When .git metadata is present,
remote URL, default branch, and head commit are stored on the space.
Team Computer file APIs expose the linked folder under project/ without
a second VCS stack. Desktop adds a native folder picker; web falls back
to an absolute path field.
Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: cynarAI <cynarAI@users.noreply.github.com>
