docs(CLAUDE.md): add code style section aligned with glyphdiff conventions

tailwind.config.ts

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