Merged Ombase's changes in main branch from frontend branch.

- Landing page
- Login page
- Sign-up page

Frontend/src/main.jsx

@@ -0,0 +1,10 @@
+import { StrictMode } from "react";
+import { createRoot } from "react-dom/client";
+import "./index.css";
+import App from "./App.jsx";
+
+createRoot(document.getElementById("root")).render(
+  <StrictMode>
+    <App />
+  </StrictMode>
+);