feat(shiki): add Shiki highlighter initialization for syntax highlighting

src/lib/shiki.ts

@@ -0,0 +1,14 @@
+import { createHighlighter, Highlighter } from "shiki";
+
+let highlighter: Highlighter;
+
+async function initializeHighlighter() {
+  highlighter = await createHighlighter({
+    themes: ["github-light-default", "github-dark-default"],
+    langs: ["c"],
+  });
+}
+
+initializeHighlighter();
+
+export { highlighter };