Fix CLI docs for viewing logs to include `--proxy` flag

[danbarr]

The --proxy flag for thv logs was added back in stacklok/toolhive#1230, but was never documented in the CLI guide (here).

It also means this statement is incorrect and should be updated to use thv logs <remote-mcp-name> --proxy

docs-website/docs/toolhive/guides-cli/manage-mcp-servers.mdx

Lines 45 to 51 in 5fd9a53

	The thv logs command only works with local containers. For remote MCP servers,
	there’s no container to read logs from, so you’ll need to check the log files
	directly in the ToolHive application directory. The path depends on your
	platform:
	- **macOS**: `~/Library/Application Support/toolhive/logs/<SERVER_NAME>.log`
	- **Linux**: `~/.local/share/toolhive/logs/<SERVER_NAME>.log`

Keeping the log file paths for general reference would be good too, but Windows needs to be added.