add perfomance chapters

implementation/18-caching/src/Settings.php

@@ -0,0 +1,16 @@
+<?php declare(strict_types=1);
+
+namespace Lubian\NoFramework;
+
+final class Settings
+{
+    public function __construct(
+        public readonly string $environment,
+        public readonly string $dependenciesFile,
+        public readonly string $middlewaresFile,
+        public readonly string $templateDir,
+        public readonly string $templateExtension,
+        public readonly string $pagesPath,
+    ) {
+    }
+}