feat: initialize landing application with Vite and Mantine configuration

apps/web/vite.config.ts

@@ -4,4 +4,8 @@ import tailwindcss from '@tailwindcss/vite';
 
 export default defineConfig({
   plugins: [react(), tailwindcss()],
+  server: {
+    port: 5173,
+    strictPort: true, // Fail if 5173 is in use. Electron NEEDS this exact port.
+  },
 });