dsh-beginner-hub: DSH Beginner Requirement Routing Panel

`dsh-beginner-hub` is a plugin designed specifically for DeepSeek Harness (DSH) beginners, solving the problem of not knowing how to get started. Built on a local rule engine, it supports requirement routing and lightweight guidance, and can convert plain language into prompts that can be directly used in a new session. It provides skill filtering, beginner self-checks, environment self-diagnostics, and a web search fallback, while running entirely locally without relying on external libraries to ensure privacy and efficiency.