dsh-tasklist: A Cross-Session Task List Memory Plugin for DeepSeek Harness

`dsh-tasklist` is a cross-session task list memory plugin for DeepSeek Harness (DSH), designed to address state continuity issues in stateless sessions. It provides task creation, updating, querying, and archiving features, along with a visualization panel. The plugin requires a web server environment and needs to be installed via the `dsh plugin` command, making it suitable for scenarios that require persistent workflow state.