dsh-get-it-for-free: Integrate free/check-in model account channels into DeepSeek Harness

The DSH plugin maintained by hulibuld integrates free and sign-in-based account channels, such as Huawei Cloud CodeArts, Tencent CodeBuddy/WorkBuddy, Qoder, TRAE, Raccoon, LobsterAI, MiniMax, ZCode, iFlytek Loomy, and MiMo, into DeepSeek Harness. The plugin supports account login, daily check-ins, timed probing of the model pool, and remote directory refreshing. Models appear as ordinary providers in the selector, and it supports hiding models by channel and local usage statistics. It requires Node.js ^22.19.0 || >=24.0.0 and DSH 0.2.0-rc.1 or higher, installed via the profile bundle method. It runs purely locally with no telemetry, writes credentials only to ~/.dsh/get-it-for-free/, and is licensed under MIT. Users should verify the source code, channel terms, and licenses independently before use.