Some work on supporting Windows

vm/os_specifics.go

@@ -0,0 +1,19 @@
+//go:build !windows
+
+package vm
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+func prepareVMCmd(cmd *exec.Cmd) {
+	// This is to prevent Ctrl+C propagating to the child process.
+	cmd.SysProcAttr = &syscall.SysProcAttr{
+		Setpgid: true,
+	}
+}
+
+func terminateProcess(pid int) error {
+	return syscall.Kill(-pid, syscall.SIGTERM)
+}