[Windows] detect builtin support for VT in supportsAnsiEscapeCodes

[codehz]

Since win10 has supported VT Sequences, we can detect it from GetConsoleMode.

zig/lib/std/fs/file.zig

Lines 141 to 144 in aa894ce

	pub fn supportsAnsiEscapeCodes(self: File) bool {
	if (builtin.os.tag == .windows) {
	return os.isCygwinPty(self.handle);
	}

[squeek502]

This was addressed by #16080