Clean up IPausable interafaces a little bit and start refactoring the pause-game flow in the minigame

Assets/Scripts/Movement/FollowerController.cs

@@ -4,6 +4,7 @@ using Pathfinding;
 using UnityEngine.SceneManagement;
 using Utils;
 using AppleHills.Core.Settings;
+using Core;
 
 /// <summary>
 /// Controls the follower character, including following the player, handling pickups, and managing held items.