Support fork-like experience for Windows

[chipsenkbeil]

When launching our server, we run distant listen --daemon ... to have the process detach from SSH and continue running. With Windows, there is no true fork that is reliable and fast. Instead, we will need to spawn a child process and pass all arguments (other than daemon). The child process will need to pipe back over stdout the credentials for the primary process to print out.

See https://stackoverflow.com/questions/52580384/fully-detach-childprocess-in-rust-on-windows for discussion. Seems like we need to run the process directly instead of via powershell or something else to ensure that it detaches and is not killed when the parent exits.

Other challenge is figuring out how to test this. We might need another CI just for Windows without WSL.

Blocks #51.

[chipsenkbeil]

Potentially implemented in 16bed46, but not tested. Need a Windows machine to test, or create an automated test that can verify end-to-end on a Window Github runner.

[chipsenkbeil]

Successfully established a fork-like experience on windows that properly keeps the process around. It's on a branch that will eventually get merged.

[github-actions]

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