moved sign-in component to a proper folder

src/app/layout.tsx

@@ -3,7 +3,7 @@ import { Geist } from "next/font/google";
 import "./globals.css";
 import { ThemeProvider } from "next-themes";
 import { ModeToggle } from "@/components/mode-toggle";
-import SignIn from "./components/sign-in";
+import SignIn from "@/components/sign-in";
 import AuthSessionProvider from "@/components/SessionProvider";
 import Link from "next/link"