The repository is now slapos-agent-skill-marketplace. Set the same name in
.claude-plugin/marketplace.json, so the repository and the marketplace match.

The install handle changes with the name. A plugin is now installed as
<plugin>@slapos-agent-skill-marketplace. A user who added the marketplace under
the earlier name must remove it and add it again. The README gives the two
commands. The plugin names do not change.

Co-Authored-By: ai-agent <ai-agent@example.com>