[DEP-0] fix(login): return error if no org found for token:

[nagypeterjob]

Note

Low Risk
Low risk behavioral change that affects CLI login/org switching flow only by turning an empty-org state into a hard error instead of silently returning nil.

Overview
Login/org selection now fails fast when the API token has no accessible organizations. helpers.SelectOrganization returns an explicit no organizations found error instead of nil, preventing downstream nil dereferences in commands like login and org switch.

^{Written by Cursor Bugbot for commit 366f7df. This will update automatically on new commits. Configure here.}