fix(tailwind): add lib/ to content scan so utils.ts classes aren't purged

Party badge colors defined in lib/utils.ts were being stripped from the
production CSS bundle because the lib/ directory was missing from the
Tailwind content glob.

Authored-By: Jack Levy

frontend/tailwind.config.ts

@@ -6,6 +6,7 @@ const config: Config = {
     "./pages/**/*.{js,ts,jsx,tsx,mdx}",
     "./components/**/*.{js,ts,jsx,tsx,mdx}",
     "./app/**/*.{js,ts,jsx,tsx,mdx}",
+    "./lib/**/*.{js,ts,jsx,tsx}",
   ],
   theme: {
     extend: {