refactor(highlightjs): export necessary methods

packages/highlightjs/src/index.ts

@@ -1 +1,3 @@
-export * from './lib/highlightjs.js';
+import hljs from "../node_modules/highlight.js/es/core.js";
+
+export const { highlight, highlightAuto } = hljs;

packages/highlightjs/src/lib/highlightjs.ts

@@ -1,3 +0,0 @@
-export function highlightjs(): string {
-  return 'highlightjs';
-}