dsh-mermaid: Rendering Mermaid Fenced Code Blocks as SVG Diagrams in DSH Web Sessions

dsh-mermaid is a DSH client plugin maintained by AKS1st, which renders inline `mermaid code blocks in web session messages into SVG diagrams. It employs a Host/Client dual-part architecture, with the mermaid runtime loaded on demand. Features include viewport-driven rendering, asynchronous queuing, light/dark theme following, fullscreen zoom-in, and visualization of rendering failures. Install via `dsh plugin --profile web add github:AKS1st/dsh-mermaid`, with `securityLevel` fixed to strict.