refactor: transport agnostic examples (#131)

examples/stdio-discovery-calculator/server.php

@@ -1,35 +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\Server;
-use Mcp\Server\Transport\StdioTransport;
-
-logger()->info('Starting MCP Stdio Calculator Server...');
-
-$server = Server::builder()
-    ->setServerInfo('Stdio Calculator', '1.1.0', 'Basic Calculator over STDIO transport.')
-    ->setInstructions('This server supports basic arithmetic operations: add, subtract, multiply, and divide. Send JSON-RPC requests to perform calculations.')
-    ->setContainer(container())
-    ->setLogger(logger())
-    ->setDiscovery(__DIR__)
-    ->build();
-
-$transport = new StdioTransport(logger: logger());
-
-$result = $server->run($transport);
-
-logger()->info('Server listener stopped gracefully.', ['result' => $result]);
-
-exit($result);