Add Sprite variables

Author: Fireball19

Packages/SOVariables/Editor/SpriteVariableEditor.cs

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+using UnityEditor;
+using UnityEngine;
+
+namespace RaCoding.Variables
+{
+    [CustomEditor(typeof(SpriteMutableVariable), editorForChildClasses: true)]
+    public class SpriteVariableEditor : VariableEditor<Sprite>
+    {
+        protected override void AssignResetValue()
+        {
+            resetValue.objectReferenceValue = value.objectReferenceValue;
+        }
+    }
+}

Packages/SOVariables/Editor/SpriteVariableEditor.cs.meta

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+using UnityEngine;
+
+namespace RaCoding.Variables
+{
+    [CreateAssetMenu(fileName = "SpriteImmutableVariable", menuName = "RaCoding/Variables/Immutable/Create new immutable Sprite variable")]
+    public class SpriteImmutableVariable : ImmutableVariable<Sprite> {}
+}

Packages/SOVariables/Runtime/Immutable/SpriteImmutableVariable.cs

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+using UnityEngine;
+
+namespace RaCoding.Variables
+{
+    [System.Serializable]
+    public class SpriteMutableVariableReference : MutableVariableReference<Sprite>
+    {
+        [SerializeField] private SpriteMutableVariable spriteMutableVariable;
+
+        protected override MutableVariable<Sprite> Reference => spriteMutableVariable; 
+    }
+}

Packages/SOVariables/Runtime/Immutable/SpriteImmutableVariable.cs.meta

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+using UnityEngine;
+
+namespace RaCoding.Variables
+{
+    [CreateAssetMenu(fileName = "SpriteMutableVariable", menuName = "RaCoding/Variables/Mutable/Create new mutable Sprite variable")]
+    public class SpriteMutableVariable : MutableVariable<Sprite> {}
+}