Stdio client does not set windowsHide

[OrKoN]

Describe the bug

MCP stdio client only sets windowsHide for electron apps https://github.com/modelcontextprotocol/typescript-sdk/blob/v1.x/src/client/stdio.ts#L128 This makes an empty console window (cmd.exe) show up if launched outside of electron.

To Reproduce
Steps to reproduce the behavior:

1. Use StdioClientTransport to launch a Node.js based server on Windows

Expected behavior
No windows should show up.

Logs
If applicable, add logs to help explain your problem.

Additional context
Mentioned here #1104

[OrKoN]

I suggest to always set windowsHide to true as 1) it is windows-specific already 2) non-Electron apps also want their server not to have any windows.