DeepSeek Harness Plugin: Integrating with Ant Digital MaaS and NVIDIA NIM

`dsh-cloud-model-providers` is a plugin for DeepSeek Harness (DSH) designed to simplify integration with Ant Digital MaaS and NVIDIA NIM. It reuses DSH built-in adapters and provides streaming model routing support through declarative configuration. Users need to provide API keys via environment variables or DSH settings, then select the corresponding route (for example, `ant-maas-responses` or `nvidia`). The plugin is compatible with DSH’s `llm-pi-ai` adapter and supports features such as streaming and tool calling. Note that it does not deploy containers, and protocol changes should be monitored.