Add Pty and CloseStdin RPCs

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

container.go

@@ -18,6 +18,10 @@ type Container interface {
 	Kill(context.Context, uint32, bool) error
 	// Exec adds a process into the container
 	Exec(context.Context, ExecOpts) (Process, error)
+	// Pty resizes the processes pty/console
+	Pty(context.Context, uint32, ConsoleSize) error
+	// CloseStdin closes the processes stdin
+	CloseStdin(context.Context, uint32) error
 }
 
 type LinuxContainer interface {
@@ -39,6 +43,11 @@ type Process interface {
 	Kill(context.Context, uint32, bool) error
 }
 
+type ConsoleSize struct {
+	Width  uint32
+	Height uint32
+}
+
 type Status int
 
 const (