Added license header to vite-env.d.ts.

Author: psmyrek

vite-env.d.ts

@@ -1,3 +1,8 @@
+/**
+ * @license Copyright (c) 2003-2025, CKSource Holding sp. z o.o. All rights reserved.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-licensing-options
+ */
+
 declare const __REACT_VERSION__: number;
 
 declare const __REACT_INTEGRATION_VERSION__: string;