dsh-kb-rag: A Local-First RAG Knowledge Base Toolkit

The DSH plugin `yumu247/dsh-kb-rag` provides a local-first RAG knowledge base toolset for DSH, designed for zero-cost, local deployment. The plugin wraps four core commands: `kb_query` for semantic retrieval, `kb_ingest` for incremental ingestion, `kb_crawl` for web scraping using Scrapling, and `kb_related` for graph-based related recommendations. Before installation, ensure the host is configured with a Python environment, an Ollama model (such as `bge-m3`), and the `kb-rag` pipeline. During installation, specify the `kbRagDir` path, which the plugin relies on to run. When in use, `kb_query` returns results in JSON format, and `kb_inge