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-method-handlers/server.php

@@ -1,70 +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\CustomMethodHandlers\CallToolRequestHandler;
-use Mcp\Example\CustomMethodHandlers\ListToolsRequestHandler;
-use Mcp\Schema\ServerCapabilities;
-use Mcp\Schema\Tool;
-use Mcp\Server;
-use Mcp\Server\Session\FileSessionStore;
-
-logger()->info('Starting MCP Custom Method Handlers Server...');
-
-$toolDefinitions = [
-    'say_hello' => new Tool(
-        name: 'say_hello',
-        inputSchema: [
-            'type' => 'object',
-            'properties' => [
-                'name' => ['type' => 'string', 'description' => 'Name to greet'],
-            ],
-            'required' => ['name'],
-        ],
-        description: 'Greets a user by name.',
-        annotations: null,
-    ),
-    'sum' => new Tool(
-        name: 'sum',
-        inputSchema: [
-            'type' => 'object',
-            'properties' => [
-                'a' => ['type' => 'number'],
-                'b' => ['type' => 'number'],
-            ],
-            'required' => ['a', 'b'],
-        ],
-        description: 'Returns a+b.',
-        annotations: null,
-    ),
-];
-
-$listToolsHandler = new ListToolsRequestHandler($toolDefinitions);
-$callToolHandler = new CallToolRequestHandler($toolDefinitions);
-$capabilities = new ServerCapabilities(tools: true, resources: false, prompts: false);
-
-$server = Server::builder()
-    ->setServerInfo('Custom Handlers Server', '1.0.0')
-    ->setContainer(container())
-    ->setSession(new FileSessionStore(__DIR__.'/sessions'))
-    ->setLogger(logger())
-    ->setCapabilities($capabilities)
-    ->addRequestHandlers([$listToolsHandler, $callToolHandler])
-    ->build();
-
-$result = $server->run(transport());
-
-logger()->info('Server listener stopped gracefully.', ['result' => $result]);
-
-shutdown($result);