dsh-prime-orchestrator: Prime Agent Orchestration Plugin

`dsh-prime-orchestrator` is a plugin for DeepSeek Harness (DSH) that turns agents into delegation engines and supports session orchestration for Prime Agent. The plugin is provided as a single installation package and integrates the host engine (including the communication layer and shared delegation table), model-side tools, Web UI queue display, and the Cloudflare Workers AI interface. It is compatible with DSH 0.1.x versions, requires installing the `dsh` and `prime-agent` CLIs, and enabling the `prime-orchestrator` preset. Note that the plugin rewrites the bootstrap manifest to extend the layout, and binary output is saved as a file.