[FEATURE] Remote path that isn't a git repo

Feature Description I'd like to be able to use this to install skills from a remote path, not a local path, that isn't a git repo

Use Case Skills marketplace that doesn't depend on git so colleagues can use from a website with a token not SSH (too complicated)

Proposed Implementation If you have ideas about how this could be implemented, share them here.

Compatibility Consideration Please confirm:

• This feature maintains compatibility with Anthropic's SKILL.md specification
• This feature works across multiple AI agents (not just Claude Code)
• This feature aligns with the simplicity goal (.claude/skills only)

Alternatives Considered Yes, pushing all the skills marketplaces to a git repo when published, but it won't solve the complexity solution

Additional Context yeah, a path like npx openskills add https://skillsplace.com/skill-name --header "Authorization: ..."