feat: add favicon and app icons

Add favicon.ico, icon.png and apple-touch-icon.png, and point the
metadata icons config at them.

Author: sxivansx

app/layout.tsx

@@ -15,7 +15,13 @@ export const metadata: Metadata = {
     "PBCTF 5.0 is a Capture the Flag competition that brings together hackers, security enthusiasts, and problem solvers across web exploitation, reverse engineering, cryptography, forensics, and more. Race the clock, capture the flags, sharpen your edge.",
   viewport: "width=device-width, initial-scale=1",
   themeColor: "#050507",
-  icons: { icon: "/images/pbctf-logo.svg" },
+  icons: {
+    icon: [
+      { url: "/favicon.ico", sizes: "any" },
+      { url: "/icon.png", type: "image/png", sizes: "32x32" },
+    ],
+    apple: "/apple-touch-icon.png",
+  },
 };
 
 export default function RootLayout({