We need to had a --host switch to the textual run command which will connect to the given host. At the moment, this defaults to 127.0.0.1, but the switch would allow the console to run on another machine.

Textual (in main) has a TEXTUAL_DEVTOOLS_HOST env var which defaults to 127.0.0.1, textual_dev should populate this env var in the textual run command.