Describe the feature

It would be nice to introduce support for custom math rendering via a new math option in RenderOptions. This allows users to intercept and replace LaTeX math spans (both inline and display) with any custom string (e.g., KaTeX/MathJax rendered HTML or specific ANSI sequences for terminal).

const html = await renderToHtml("This is $E=mc^2$", {
  math: (code, display) => {
    return display 
      ? `<div class="math-display">${render(code)}</div>` 
      : `<span class="math-inline">${render(code)}</span>`;
  }
});

Additional information

• Would you be willing to help implement this feature?