dsh-win-proxy: One command to set up Windows system proxy and git/npm/pip proxies

DSH ignores proxy software settings; even with the system proxy enabled, cloning code or installing packages may fail. dsh-win-proxy (Proxy Switch, maintained by Mowendao, MIT license) provides three equivalent entry points—the settings page, the `/proxy` command, or interactive mode—to toggle the Windows system proxy along with the proxy settings for git, npm, and pip. It supports viewing status, checking port listening, preserving manually added bypass lists, and requires no administrator privileges. Compatible with Windows 10/11 and DSH 0.2.x. This article provides installation commands, usage instructions, configuration options, and precautions.