dsh-extension-hub: Unified Management of Skills, MCPs, and Plugins in DSH Web

`dsh-extension-hub` is a DeepSeek Harness (DSH) plugin maintained by Relistencode under the MIT license, designed to provide a centralized entry point for extension management. It addresses the fragmented management of skills, MCP servers, and plugins by allowing users to uniformly create, edit, enable, disable, import, update, and uninstall extensions within the "Settings > Extension Management" page of DSH Web. The plugin supports managing both `stdio` and `streamable-http` types of MCP, enabling configuration import from Claude/Codex and project-level installation through a folder selector. Its built-in Plugin Market offers npm