✨ feat(layout): Enhance blog post layout for better readability

Adds a `m-auto` class to center the blog post content and sets a
maximum width of `3xl` for larger screens to improve readability.

app/blogpost/layout.tsx

@@ -9,7 +9,7 @@ import MainFooter from "@/components/footer/main";
 
 export default function RootLayout({ children }: { children: React.ReactNode }) {
   return (
-    <div className="text-base">
+    <div className="m-auto text-base 2xl:w-3xl xl:w-3xl md:w-full">
       {children}
     </div>
   );