Add vite-env.d.ts so TypeScript knows about import.meta.env

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/vite-env.d.ts

@@ -0,0 +1,9 @@
+/// <reference types="vite/client" />
+
+interface ImportMetaEnv {
+  readonly VITE_HOTEL_NAME: string
+}
+
+interface ImportMeta {
+  readonly env: ImportMetaEnv
+}