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

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

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+<?php declare(strict_types=1);
+
+use FastRoute\Dispatcher;
+use Laminas\Diactoros\ResponseFactory;
+use Lubian\NoFramework\Factory\DiactorosRequestFactory;
+use Lubian\NoFramework\Factory\PipelineProvider;
+use Lubian\NoFramework\Factory\RequestFactory;
+use Lubian\NoFramework\Http\BasicEmitter;
+use Lubian\NoFramework\Http\Emitter;
+use Lubian\NoFramework\Http\InvokerRoutedHandler;
+use Lubian\NoFramework\Http\Pipeline;
+use Lubian\NoFramework\Http\RoutedRequestHandler;
+use Lubian\NoFramework\Http\RouteMiddleware;
+use Lubian\NoFramework\Repository\FileSystemMarkdownPageRepo;
+use Lubian\NoFramework\Repository\MarkdownPageRepo;
+use Lubian\NoFramework\Service\Time\Now;
+use Lubian\NoFramework\Service\Time\SystemClockNow;
+use Lubian\NoFramework\Settings;
+use Lubian\NoFramework\Template\MarkdownParser;
+use Lubian\NoFramework\Template\MustacheRenderer;
+use Lubian\NoFramework\Template\ParsedownParser;
+use Lubian\NoFramework\Template\Renderer;
+use Mustache_Engine as ME;
+use Mustache_Loader_FilesystemLoader as MLF;
+use Psr\Http\Message\ResponseFactoryInterface;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface;
+use Symfony\Component\Cache\Adapter\FilesystemAdapter;
+use Symfony\Contracts\Cache\CacheInterface;
+
+use function FastRoute\simpleDispatcher;
+
+return [
+    // alias
+    Now::class => fn (SystemClockNow $n) => $n,
+    ResponseFactoryInterface::class => fn (ResponseFactory $rf) => $rf,
+    Emitter::class => fn (BasicEmitter $e) => $e,
+    MiddlewareInterface::class => fn (RouteMiddleware $r) => $r,
+    RoutedRequestHandler::class => fn (InvokerRoutedHandler $h) => $h,
+    RequestFactory::class => fn (DiactorosRequestFactory $rf) => $rf,
+    CacheInterface::class => fn (FilesystemAdapter $a) => $a,
+    MarkdownParser::class => fn (ParsedownParser $p) => $p,
+    MarkdownPageRepo::class => fn (FileSystemMarkdownPageRepo $r) => $r,
+
+    // Factories
+    ResponseInterface::class => fn (ResponseFactory $rf) => $rf->createResponse(),
+    ServerRequestInterface::class => fn (RequestFactory $rf) => $rf->fromGlobals(),
+    Renderer::class => fn (Mustache_Engine $e) => new MustacheRenderer($e),
+    MLF::class => fn (Settings $s) => new MLF($s->templateDir, ['extension' => $s->templateExtension]),
+    ME::class => fn (MLF $mfl) => new ME(['loader' => $mfl]),
+    Dispatcher::class => fn () => simpleDispatcher(require __DIR__ . '/routes.php'),
+    Pipeline::class => fn (PipelineProvider $p) => $p->getPipeline(),
+    FileSystemMarkdownPageRepo::class => fn (Settings $s) => new FileSystemMarkdownPageRepo($s->pagesPath),
+];

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

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+<?php declare(strict_types=1);
+
+use Lubian\NoFramework\Http\RouteMiddleware;
+use Middlewares\TrailingSlash;
+use Middlewares\Whoops;
+
+return [
+    Whoops::class,
+    TrailingSlash::class,
+    RouteMiddleware::class,
+];

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

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+<?php declare(strict_types=1);
+
+use FastRoute\RouteCollector;
+use Lubian\NoFramework\Action\Hello;
+use Lubian\NoFramework\Action\Other;
+use Lubian\NoFramework\Action\Page;
+use Psr\Http\Message\ResponseInterface as Response;
+
+return function (RouteCollector $r): void {
+    $r->addRoute('GET', '/hello[/{name}]', Hello::class);
+    $r->addRoute('GET', '/page', [Page::class, 'list']);
+    $r->addRoute('GET', '/page/{page}', [Page::class, 'show']);
+    $r->addRoute('GET', '/another-route', [Other::class, 'someFunctionName']);
+    $r->addRoute('GET', '/', fn (Response $r) => $r->withStatus(302)->withHeader('Location', '/hello'));
+};

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

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+<?php declare(strict_types=1);
+
+use Lubian\NoFramework\Settings;
+
+return new Settings(
+    environment: 'prod',
+    dependenciesFile: __DIR__ . '/dependencies.php',
+    middlewaresFile: __DIR__ . '/middlewares.php',
+    templateDir: __DIR__ . '/../templates',
+    templateExtension: '.html',
+    pagesPath: __DIR__ . '/../data/pages/',
+);