Fix indentation issues in PHP files

- Fixed tabs vs spaces indentation issues in PHP files
- Updated phpcs.xml configuration

includes/class-core.php

@@ -12,39 +12,39 @@ namespace WPALLSTARS\PluginStarterTemplate;
  */
 class Core {
 
-	/**
-	 * Plugin version
-	 *
-	 * @var string
-	 */
-	private $version;
+    /**
+     * Plugin version
+     *
+     * @var string
+     */
+    private $version;
 
-	/**
-	 * Constructor
-	 *
-	 * @param string $version Plugin version.
-	 */
-	public function __construct( $version = '' ) {
-		// Initialize hooks.
-		$this->version = $version;
-	}
+    /**
+     * Constructor
+     *
+     * @param string $version Plugin version.
+     */
+    public function __construct( $version = '' ) {
+        // Initialize hooks.
+        $this->version = $version;
+    }
 
-	/**
-	 * Example method to filter content
-	 *
-	 * @param string $content The content to filter.
-	 * @return string The filtered content.
-	 */
-	public function filter_content( $content ) {
-		return $content;
-	}
+    /**
+     * Example method to filter content
+     *
+     * @param string $content The content to filter.
+     * @return string The filtered content.
+     */
+    public function filter_content( $content ) {
+        return $content;
+    }
 
-	/**
-	 * Get the plugin version
-	 *
-	 * @return string The plugin version.
-	 */
-	public function get_plugin_version() {
-		return $this->version;
-	}
+    /**
+     * Get the plugin version
+     *
+     * @return string The plugin version.
+     */
+    public function get_plugin_version() {
+        return $this->version;
+    }
 }