Refactor MTP Setup Stack

An unexpected diversion occurred this week when the state of the settings stack needed to be rewritten.

There's been a long-standing issue with serialization in the MindTwin project. Since the project uses mostly custom classes for various parts of the rig, each component's serialization was creating needless slowdowns during playback - particularly in Plug and PlugFrame classes and their dependencies.

I initially didn't want to rewrite the core structure and attempted to patch fix parts. In doing so, I broke lots of things and decided to refactor it correctly.

The result is a gain of 5-10 fps, quicker load times, less crashing, cleaner code and a more flexible serialization structure moving forward.

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    public void Setup () {

        setup_complete = false;

        FaceRigComponents components = FaceRigSetup.GetComponents();
        head_transform = components.HeadTop;
        setup_top = FaceRigSetup.GetSetupTop();
        mask_geometry = FaceRigSetup.GetMaskGeo();
        mesh = FaceRigSetup.GetMesh(mask_geometry);
        FaceRigSetup.MakeSpecMesh(mesh);
        points = FaceRigSetup.GetPoints(this, mesh);
        bones = this.gameObject.AddComponent<FaceBones>();
        bones.Setup(components.AifFaceRigTop);
        EyeRigComponents eye_components = EyeSetup.SetupEyePoints(components);

        mocap = new MocapController();
        mocap.Setup();

        eyes = this.gameObject.AddComponent<Eyes>();
        eyes.Setup(components, eye_components);

        lips = this.gameObject.AddComponent<Lips>();
        lips.Setup(components);

        mouth = this.gameObject.AddComponent<Mouth>();
        mouth.Setup(components);

        falloff_points = new FaceFalloffPoints();
        falloff_points.Setup();

        SetupDisplayMask();

        eyes.Draw();
        setup_complete = true;

        falloff_points.SetActive(false);
        mouth.Debug.SetActive(false);
        lips.Debug.SetActive(false);

        new UnityEditor.SerializedObject(this).ApplyModifiedProperties();

    }