fix(design-system): include notices only during production builds

Signed-off-by: Arjun Mahanti <arjun@squareup.com>
Co-authored-by: Codex <noreply@openai.com>

desktop-next/vite.config.ts

@@ -18,6 +18,7 @@ export default defineConfig({
     react(),
     {
       name: "license-notices",
+      apply: "build",
       closeBundle() {
         copyFileSync(
           "../packages/ui/THIRD_PARTY_NOTICES.md",

packages/ui/vite.config.ts

@@ -4,6 +4,7 @@ export default defineConfig({
   plugins: [
     {
       name: "license-notices",
+      apply: "build",
       closeBundle() {
         copyFileSync("THIRD_PARTY_NOTICES.md", "dist/THIRD_PARTY_NOTICES.md");
         copyFileSync("../../LICENSE", "dist/LICENSE");