“She’ll take care of the little things, so you can spend more time doing the things that matter.” — Note: spoilers ahead! There are in-depth spoilers for the entire film throughout. M3GAN, directed by Gerald Johnstone and written by Akela Cooper, is a great little horror film — it’s funny, it’s freaky, it’s well-paced, and obviously M3gan herself is a really great character who’s already had a lot of…