message: feat(md-enhance): support c4c in mermaid
diff: @@ -50,6 +50,8 @@ export const mermaid: PluginSimple = (md) => {
  if (info.trim() === "pie") return mermaidHackRender("pie", content, index);
  if (info.trim() === "git-graph")
  return mermaidHackRender("gitGraph", content, index);
  + if (info.trim() === "c4c")
  + return mermaidHackRender("C4Context", content, index);
  return fence!(...args);
  };
  