Limit colors and re-use tailwind config in desktop

crates/librqbit/webui/tailwind.config.ts

@@ -0,0 +1,21 @@
+import colors from "tailwindcss/colors";
+
+import type { Config } from "tailwindcss";
+
+export default {
+  content: ["./index.html", "./src/**/*.{js,ts,jsx,tsx}"],
+  darkMode: "class",
+  theme: {
+    colors: {
+      transparent: colors.transparent,
+      amber: colors.amber,
+      black: colors.black,
+      blue: colors.blue,
+      slate: colors.slate,
+      white: colors.white,
+      gray: colors.gray,
+      green: colors.green,
+      red: colors.red,
+    },
+  },
+} satisfies Config;