Move shim service into top lvl package

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

shim/process.go

@@ -0,0 +1,22 @@
+package shim
+
+import (
+	"context"
+
+	runc "github.com/crosbymichael/go-runc"
+)
+
+type process interface {
+	// Pid returns the pid for the process
+	Pid() int
+	// Start starts the user's defined process inside
+	Start(context.Context) error
+	// Delete deletes the process and closes all open pipes
+	Delete(context.Context) error
+	// Resize resizes the process console
+	Resize(ws runc.WinSize) error
+	// Exited sets the exit status for the process
+	Exited(status int)
+	// Status returns the exit status
+	Status() int
+}