Use winrm instead of ssh for Windows build

[AtaxyaNetwork]

From #6

That when communicator is specified as winrm, that we're not obliged to insert ssh credentials (ssh_username) on the config.

Since windows can't use ssh to connect (I think?) we need to use winrm instead of ssh to connect to the VM and launch the shutdown.

I may need some input from a Windows guys/girl to be sure about how Windows works exactly and the best practice about building windows images, but otherwise should be a quick fix.

To be investigated.

[wezke]

I believe the default method for Windows is winrm , having a hard time getting a windows vm build without having winrm plus
allowing ssh in an image is not always allowed in enterprises.

[HaroldVB]

Windows 11 and Windows Server 2025 support OpenSSH out of the box as we speak!
Please see the following documentation to install it on either Windows Server or Windows 11.

https://learn.microsoft.com/en-us/windows-server/administration/openssh/openssh_install_firstuse?tabs=gui&pivots=windows-server-2025

I'm currently also building a template and this works perfectly! You can install the OpenSSH server using autounattend.xml.