dsh-doc-backup: Return Family Document Management Solutions Based on Parameters

`dsh-doc-backup` is a plugin in the DeepSeek Harness (DSH) ecosystem, developed by maintainer uckkk. Through parameterized invocation, it can directly return standardized solutions for managing family archives and official documents, addressing the low efficiency of manual document maintenance. Implemented in pure Node.js with no network dependencies, it runs with the permissions of the current process. It is suitable for developers or users who need to quickly generate management solutions and is easy to install.