Added FreeBSD support

tty/Terminal_bsd.go

@@ -1,3 +1,5 @@
+//go:build darwin || freebsd
+
 package tty
 
 import "golang.org/x/sys/unix"

tty/Terminal_linux.go

@@ -1,3 +1,5 @@
+//go:build linux
+
 package tty
 
 import "golang.org/x/sys/unix"

tty/Terminal_other.go

@@ -0,0 +1,8 @@
+//go:build !darwin && !freebsd && !linux && !windows
+
+package tty
+
+// IsTerminal is always false on unsupported platforms.
+func IsTerminal(fd uintptr) bool {
+	return false
+}

tty/Terminal_windows.go

@@ -1,3 +1,5 @@
+//go:build windows
+
 package tty
 
 import "golang.org/x/sys/windows"