fix: `@` alias for import code snippet being always `undefined` (#204)

Co-authored-by: Kia King Ishii <kia.king.08@gmail.com>

src/node/markdown/markdown.ts

@@ -42,6 +42,7 @@ export interface MarkdownRenderer {
 }
 
 export const createMarkdownRenderer = (
+  root: string,
   options: MarkdownOptions = {}
 ): MarkdownRenderer => {
   const md = MarkdownIt({
@@ -55,7 +56,7 @@ export const createMarkdownRenderer = (
   md.use(componentPlugin)
     .use(highlightLinePlugin)
     .use(preWrapperPlugin)
-    .use(snippetPlugin)
+    .use(snippetPlugin, root)
     .use(hoistPlugin)
     .use(containerPlugin)
     .use(extractHeaderPlugin)

src/node/markdownToVue.ts

@@ -19,7 +19,7 @@ export function createMarkdownToVueRenderFn(
   root: string,
   options: MarkdownOptions = {}
 ) {
-  const md = createMarkdownRenderer(options)
+  const md = createMarkdownRenderer(root, options)
 
   return (src: string, file: string): MarkdownCompileResult => {
     const relativePath = slash(path.relative(root, file))