Mermaid.js, but headless, in Rust. Mermaid.js is a JavaScript diagramming tool that turns text such as flowchart TD; A-->B; into diagrams for Markdown, docs, and web apps. Merman is a parity-focused, headless Rust implementation of Mermaid.js for parsing, layout, and browserless rendering. It targets mermaid@11.15.0, produces semantic JSON, layout JSON, SVG, raster formats, and ASCII/Unicode outpu