Added Layout and Header component

frontend/src/components/Header.tsx

@@ -0,0 +1,11 @@
+import React from "react";
+
+const Header: React.FC = () => {
+  return (
+    <header>
+      <h1>Header</h1>
+    </header>
+  );
+};
+
+export default Header;

frontend/src/layout/Layout.tsx

@@ -0,0 +1,32 @@
+import React from "react";
+import Header from "../components/Header";
+import "../App.css";
+import { ToastContainer } from "react-toastify";
+
+type LayoutProps = {
+  children: React.ReactNode;
+};
+
+const Layout: React.FC<LayoutProps> = ({ children }) => {
+  return (
+    <>
+      <Header />
+      <main>{children}</main>
+      <footer></footer>
+      <ToastContainer
+        position="top-right"
+        autoClose={5000}
+        hideProgressBar={false}
+        newestOnTop
+        closeOnClick
+        rtl={false}
+        pauseOnFocusLoss={false}
+        draggable
+        pauseOnHover
+        theme="light"
+      />
+    </>
+  );
+};
+
+export default Layout;