Move examples to server directory (#198)

* move examples to server directory

This will prepare for the client implementation in https://github.com/modelcontextprotocol/php-sdk/pull/192

* fix move bootstrap too

examples/custom-dependencies/server.php

@@ -1,45 +0,0 @@
-#!/usr/bin/env php
-<?php
-
-/*
- * This file is part of the official PHP MCP SDK.
- *
- * A collaboration between Symfony and the PHP Foundation.
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-require_once dirname(__DIR__).'/bootstrap.php';
-chdir(__DIR__);
-
-use Mcp\Example\CustomDependencies\Service\InMemoryTaskRepository;
-use Mcp\Example\CustomDependencies\Service\StatsServiceInterface;
-use Mcp\Example\CustomDependencies\Service\SystemStatsService;
-use Mcp\Example\CustomDependencies\Service\TaskRepositoryInterface;
-use Mcp\Server;
-use Mcp\Server\Session\FileSessionStore;
-
-logger()->info('Starting MCP Custom Dependencies Server...');
-
-$container = container();
-
-$taskRepo = new InMemoryTaskRepository(logger());
-$container->set(TaskRepositoryInterface::class, $taskRepo);
-
-$statsService = new SystemStatsService($taskRepo);
-$container->set(StatsServiceInterface::class, $statsService);
-
-$server = Server::builder()
-    ->setServerInfo('Task Manager Server', '1.0.0')
-    ->setContainer($container)
-    ->setSession(new FileSessionStore(__DIR__.'/sessions'))
-    ->setLogger(logger())
-    ->setDiscovery(__DIR__)
-    ->build();
-
-$result = $server->run(transport());
-
-logger()->info('Server listener stopped gracefully.', ['result' => $result]);
-
-shutdown($result);