dsh-airp: AIRP World Package Engine on DeepSeek Harness

dsh-airp is an AIRP engine plugin deployed on DeepSeek Harness (DSH), licensed under the MIT license. Its core architecture comprises a deep module, WorldKernel, and a shallow Host adapter, which treats "world packs" as directory data rather than code. The engine identifies valid packages by verifying the `pack.yaml` file within the directory. Key functions encompass WorldKernel verification, narration, and retrieval, as well as Pack loading, verification, and directory management. An optional `airpStage` function enables the conversion of local images into same-origin HTTP URLs for embedding in dialogue. During installation, use the `dsh plugin` command to add it to the web profile and copy `airp-play` and `airp-author`.