feat: support markdown options pre config

src/node/markdown/markdown.ts

@@ -19,6 +19,7 @@ const toc = require('markdown-it-table-of-contents')
 
 export interface MarkdownOptions extends MarkdownIt.Options {
   lineNumbers?: boolean
+  preConfig?: (md: MarkdownIt) => void
   config?: (md: MarkdownIt) => void
   anchor?: {
     permalink?: AnchorOptions['permalink']
@@ -50,6 +51,10 @@ export const createMarkdownRenderer = (
     ...options
   })
 
+  if (options.preConfig) {
+    options.preConfig(md)
+  }
+
   // custom plugins
   md.use(componentPlugin)
     .use(highlightLinePlugin)