windows: Make `ctrl-n` open a new terminal when in a terminal (#38900)

This is how `ctrl-n` works on macOS. Right now `ctrl-n` on Windows with
the default keymap usually causes a new buffer to open, which is
inconvenient.

Release Notes:

- N/A
40138e12a4Cole Miller committed on 9/25/2025, 5:51:19 PM· committed by GitHubparente7a5c81
1 file changedLine totals unavailable