replace old docs

packages/docs/src/helpers/markdown.ts

@@ -0,0 +1,15 @@
+import grayMatter from "gray-matter"
+import MarkdownIt from "markdown-it"
+import prism from "markdown-it-prism"
+import { readFile } from "node:fs/promises"
+
+const renderer = new MarkdownIt({
+  html: true,
+  linkify: true,
+}).use(prism)
+
+export async function renderMarkdownFile(filePath: string) {
+  const { data, content } = grayMatter(await readFile(filePath, "utf8"))
+  const html = renderer.render(content)
+  return { html, data }
+}