Env: Add tailwindcss + prettier

tailwind.config.js

@@ -0,0 +1,8 @@
+/** @type {import('tailwindcss').Config} */
+export default {
+  content: ["./src/**/*.{html,js,svelte,ts}"],
+  theme: {
+    extend: {},
+  },
+  plugins: [],
+};