dsh-plugin-ide-hub: Unified Management of Coding IDE Sessions, Usage, and Rules

The DeepSeek Harness ecosystem plugin `dsh-plugin-ide-hub` is designed to address management challenges in multi-IDE environments. Instead of calling vendor APIs, the plugin reads local disk state directly, providing a unified entry point for inventory, management, and export. Core features include adapter and rule file inventory, quota migration recommendations, session recovery, today's priority sorting, and Obsidian note generation. After installation, restart `dsh` and verify the configuration. Known limitations include hidden Trae sessions, path dependencies for some domestic IDEs, and read/write security mechanisms.