clan-ui: remove intermediate app directory

pkgs/clan-app/ui/tailwind.config.ts

@@ -0,0 +1,11 @@
+import typography from "@tailwindcss/typography";
+import core from "./tailwind/core-plugin";
+
+/** @type {import('tailwindcss').Config} */
+const config = {
+  content: ["./src/**/*.{js,jsx,ts,tsx}"],
+  theme: {},
+  plugins: [typography, core],
+};
+
+export default config;