OMDSH Hub: DeepSeek Harness Community Extension Catalog and Profile Generation Manager

OMDSH Hub is a community project located in the `omdsh-dev/dsh-hub` repository, positioned as an extension catalog and Profile generation manager for DeepSeek Harness (DSH), built on a plugin architecture. This project is not an official application store and has no official affiliation with DeepSeek. The current version is 0.1.0-rc.1, licensed under MIT, and marked as `private: true`. Its core capabilities include providing a community extension catalog, transactional installation and rollback, catalog browsing, and settings UI presentation. By reusing Harness's Profile, Bundle, Repository Plugin capabilities and registering a loopback-only management API (`/omds