chore: add TODO comments for future enhancements

- Added TODO comments in middleware.ts, routes.ts, sitemap.ts, and routing.ts to indicate areas for future improvements, including middleware rules for protected routes, route configuration, and sitemap entries.
- Included a comment in globals.css for reference to shadcn UI theming documentation.

src/i18n/routing.ts

@@ -1,5 +1,6 @@
 import { defineRouting } from 'next-intl/routing';
 
+// TODO: add config for the locales
 export const LOCALE_LIST: Record<string, { flag: string; name: string }> = {
   en: { flag: '🇺🇸', name: 'English' },
   zh: { flag: '🇨🇳', name: '中文' },

src/middleware.ts

@@ -3,6 +3,8 @@ import { routing } from './i18n/routing';
 
 export default createMiddleware(routing);
 
+// TODO: add middleware rules for protected routes
+
 /**
  * Next.js internationalized routing
  *

src/routes.ts

@@ -1,5 +1,7 @@
 /**
  * The routes for the application
+ * 
+ * TODO: add config for the routes
  */
 export enum Routes {
   Root = '/',

src/sitemap.ts

@@ -14,6 +14,8 @@ export default function sitemap(): MetadataRoute.Sitemap {
 type Href = Parameters<typeof getLocalePathname>[0]['href'];
 
 /**
+ * TODO: add more entries for the sitemap
+ * 
  * https://next-intl.dev/docs/environments/actions-metadata-route-handlers#sitemap
  * https://github.com/amannn/next-intl/blob/main/examples/example-app-router/src/app/sitemap.ts
  */

src/styles/globals.css

@@ -98,6 +98,7 @@
 }
 
 /* shadcn ui base colors for different themes */
+/* https://tweakcn.com/ */
 /* https://ui.shadcn.com/docs/theming#base-colors */
 /* https://ui.pub/x/theme-gen */
 /* https://spectr.irung.me/ */