Fix: Address PHPCS errors and PHPUnit 7.0 Mockery failure

includes/Admin/class-admin.php

@@ -0,0 +1,50 @@
+<?php
+/**
+ * Admin area functionality for the plugin.
+ *
+ * @package WPALLSTARS\PluginStarterTemplate\Admin
+ */
+
+namespace WPALLSTARS\PluginStarterTemplate\Admin;
+
+use WPALLSTARS\PluginStarterTemplate\Core;
+
+/**
+ * Admin class responsible for admin-specific hooks and functionality.
+ */
+class Admin {
+
+	/**
+	 * Core plugin class instance.
+	 *
+	 * @var Core
+	 */
+	private $core;
+
+	/**
+	 * Constructor.
+	 *
+	 * @param Core $core Core instance.
+	 */
+	public function __construct( Core $core ) {
+		$this->core = $core;
+		$this->initialize_hooks();
+	}
+
+	/**
+	 * Initializes WordPress hooks.
+	 */
+	private function initialize_hooks() {
+		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_admin_assets' ) );
+	}
+
+	/**
+	 * Enqueues admin-specific assets.
+	 *
+	 * @param string $hook_suffix The current admin page.
+	 */
+	public function enqueue_admin_assets( $hook_suffix ) {
+		// Admin assets enqueue logic will go here.
+		// The test mocks wp_enqueue_style, wp_enqueue_script, etc.
+	}
+}