Refactor hut tier definitions to use images and scales instead of scene paths; add moddable visual component

Scripts/Components/ModdableVisual.cs

@@ -0,0 +1,28 @@
+using Godot;
+
+namespace ParasiticGod.Scripts.Components;
+
+[GlobalClass]
+public partial class ModdableVisual : Node2D
+{
+    [Export] private Sprite2D _sprite;
+    public Follower.FollowerTier Tier { get; private set; }
+
+    public override void _ExitTree()
+    {
+        if (_sprite != null)
+        {
+            _sprite.Texture = null;
+        }
+    }
+
+    public void Initialize(Follower.FollowerTier tier, Texture2D texture, Vector2 scale)
+    {
+        Tier = tier;
+        if (_sprite != null && texture != null)
+        {
+            _sprite.Texture = texture;
+            _sprite.Scale = scale;
+        }
+    }
+}