🚚 mv: change layout folder structure

Separate the navbar from the root layout, keeping the root layout clean. Create two child layout folders:
1. main: for basic layouts such as the navbar
2. clean: for clean layouts without any extra elements.

app/(main)/page.tsx

@@ -0,0 +1,5 @@
+import HomeIndex from "@/features/home";
+
+export default function Page() {
+  return <HomeIndex />;
+}