dsh-doc-sort: Family Archive and Document Management Solution

`dsh-doc-sort` is a DeepSeek Harness (DSH) plugin focused on local classification and management of documents and credentials. It requires no network access and is implemented in pure Node.js. By registering the `doc_sort` tool, it enables users to generate household document management plans offline. It is suitable as a complement to DSH memory management, especially for scenarios requiring local processing of document structures.