feat: update landing page and add new library and scan pages

- Refactor landing page content and links for better user experience.
- Introduce a new library page to display disease information with filtering and modal details.
- Add a scan page for users to upload images for diagnosis with a preview modal.
- Enhance login and registration pages with automatic navigation to the dashboard.
- Integrate vite-tsconfig-paths for improved path resolution in Vite configuration.

apps/web/src/components/layout/main-layout.tsx

@@ -0,0 +1,17 @@
+import { ReactNode } from "react";
+import { Navbar } from "./navbar";
+import { Footer } from "./footer";
+
+type Props = { children: ReactNode };
+
+export function MainLayout({ children }: Props) {
+  return (
+    <div className="min-h-screen flex flex-col bg-[#ECF4E8]">
+      <Navbar />
+      <main className="mx-auto w-full max-w-6xl flex-1 px-6 py-8">
+        {children}
+      </main>
+      <Footer />
+    </div>
+  );
+}