FEAT: Added Google OAuth login feature to sign up as well as login

frontend/src/components/Auth/OAuth.tsx

@@ -0,0 +1,23 @@
+import { useEffect } from "react";
+
+export default function GoogleLogin() {
+  const handleLoginClick = (e: React.MouseEvent<HTMLButtonElement>) => {
+    e.preventDefault();
+    window.location.href = "/api/login/google";
+  };
+
+  return (
+    <div>
+    <button
+        onClick={handleLoginClick}
+        className="flex items-center justify-start bg-white text-gray-600 font-semibold py-1 px-2 rounded shadow-md w-[220px] hover:bg-gray-100 active:bg-gray-200">
+        <img
+        src="../../../images/icons/google-icon.png"
+        alt="Google logo"
+        className="w-8 h-8 mr-2"
+        />
+        <span className="flex-grow">Sign in with Google</span>
+    </button>
+    </div>
+  );
+}