feat(gui): Switch to tailwind

apps/gui/tailwind.config.ts

@@ -0,0 +1,11 @@
+import type { Config } from "tailwindcss";
+
+const config: Config = {
+  content: ["./src/**/*.{js,ts,jsx,tsx,mdx}"],
+  theme: {
+    extend: {},
+  },
+  plugins: [],
+};
+
+export default config;