Feat: Implement Admin class structure and instantiate in Plugin

includes/Admin/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', [ $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.
+	}
+}

includes/class-plugin.php

@@ -7,6 +7,8 @@
 
 namespace WPALLSTARS\PluginStarterTemplate;
 
+use WPALLSTARS\PluginStarterTemplate\Admin\Admin;
+
 /**
  * Plugin class
  */
@@ -19,6 +21,13 @@ class Plugin {
 	 */
 	private $core;
 
+	/**
+	 * Admin instance
+	 *
+	 * @var Admin
+	 */
+	private $admin;
+
 	/**
 	 * Plugin file
 	 *
@@ -43,6 +52,7 @@ class Plugin {
 		$this->plugin_file = $plugin_file;
 		$this->version     = $version;
 		$this->core        = new Core();
+		$this->admin       = new Admin( $this->core );
 	}
 
 	/**