Split testsuite for unit and inspector based tests (#82)

tests/Example/StdioCalculatorExampleTest.php

@@ -1,30 +0,0 @@
-<?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.
- */
-
-namespace Mcp\Tests\Example;
-
-use PHPUnit\Framework\Attributes\Group;
-
-#[Group('inspector')]
-final class StdioCalculatorExampleTest extends InspectorSnapshotTestCase
-{
-    public static function provideMethods(): array
-    {
-        return [
-            ...parent::provideListMethods(),
-        ];
-    }
-
-    protected function getServerScript(): string
-    {
-        return \dirname(__DIR__, 2).'/examples/01-discovery-stdio-calculator/server.php';
-    }
-}