add chapter about data repositories, and start work on perfomance chapter

implementation/16-data-repository/cli-config.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\Tools\Console\ConsoleRunner;
+use Lubian\NoFramework\Factory\FileSystemSettingsProvider;
+use Lubian\NoFramework\Factory\SettingsContainerProvider;
+
+$settingsProvider = new FileSystemSettingsProvider(__DIR__ . '/config/settings.php');
+$container = (new SettingsContainerProvider($settingsProvider))->getContainer();
+
+return ConsoleRunner::createHelperSet($container->get(EntityManagerInterface::class));