🚚 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)/layout.tsx

@@ -0,0 +1,13 @@
+import Navbar from "@/shared/widgets/navbar/components/Navbar";
+import React from "react";
+
+const layout = ({ children }: Readonly<{ children: React.ReactNode }>) => {
+  return (
+    <div className="max-w-400 mx-auto relative">
+      <Navbar />
+      <div className="pt-16">{children}</div>
+    </div>
+  );
+};
+
+export default layout;