[Server] Simplify server entrypoint with run-based transport lifecycle (#103)

* feat: replace connect/listen flow with run lifecycle

* feat(transport): add phpstan generics for typed transport returns

* refactor: standardize variable naming for MCP server instances in transport handling

* test: remove unnecessary phpstan-ignore annotation in DocBlockTestFixture

examples/http-complex-tool-schema/server.php

@@ -35,8 +35,6 @@ $server = Server::builder()
 
 $transport = new StreamableHttpTransport($request, $psr17Factory, $psr17Factory);
 
-$server->connect($transport);
-
-$response = $transport->listen();
+$response = $server->run($transport);
 
 (new SapiEmitter())->emit($response);