- Add first-class --skills <list> option to `paperclipai company export`,
passing through to the existing service support for skill selection
- Remove broken `type: "url"` source branch from import command — the shared
schema and server only accept `inline | github`, so non-GitHub HTTP URLs
now error clearly instead of failing at validation
- Export isHttpUrl/isGithubUrl helpers for testability
- Add server tests for skills-filtered export (selected + fallback)
- Add CLI tests for URL detection helpers
Co-Authored-By: Paperclip <noreply@paperclip.ing>