Add a windows terminal type

[davidrg]

Windows 10 v1809 introduced PTY support which translates the Windows Console APIs into ANSI escape sequences.

It may be worth adding a terminal emulation option to try and match what the Windows terminal now does for compatibility with applications running in a PTY. Microsoft documents some escapes sequences here but as they refer to the xterm documentation its possible this may not be comprehensive:
https://learn.microsoft.com/en-us/windows/console/console-virtual-terminal-sequences

Possibly a windows terminal emulation would be a variant of xterm emulation.