update to svelte 5 and tw 4 etc

vite.config.js

@@ -1,12 +1,7 @@
 import { sveltekit } from "@sveltejs/kit/vite";
-import { fileURLToPath, URL } from "node:url";
+import tailwindcss from "@tailwindcss/vite";
 import { defineConfig } from "vite";
 
 export default defineConfig({
-  plugins: [sveltekit()],
-  resolve: {
-    alias: {
-      "@": fileURLToPath(new URL("./src", import.meta.url)), // Use '@' as an alias for 'src'
-    },
-  },
+  plugins: [tailwindcss(), sveltekit()],
 });