Fix: Resolve CI errors

- Fix docblock spacing for @phpcs:ignore in Admin class.
- Add WP_Mock for wp_create_nonce() in AdminTest.

includes/Admin/class-admin.php

@@ -41,6 +41,7 @@ class Admin {
 	/**
 	 * Enqueues admin scripts and styles.
 	 *
+	
 	 * @phpcs:ignore WordPress.CodeAnalysis.UnusedFunctionParameter.Found
 	 * @param string $hook_suffix The current admin page.
 	 */