move some non-post pages to mdx

lib/helpers/remark-rehype-plugins.ts

@@ -1,3 +1,4 @@
+export { default as rehypeMdxImportMedia } from "rehype-mdx-import-media";
 export { default as rehypePrism } from "rehype-prism-plus";
 export { default as rehypeSanitize } from "rehype-sanitize";
 export { default as rehypeSlug } from "rehype-slug";
@@ -7,6 +8,3 @@ export { default as remarkGfm } from "remark-gfm";
 export { default as remarkParse } from "remark-parse";
 export { default as remarkRehype } from "remark-rehype";
 export { default as remarkSmartypants } from "remark-smartypants";
-
-// @ts-ignore
-export { default as rehypeMdxImportMedia } from "rehype-mdx-import-media";