Ajout de la difficulté dans le modèle CoreData

Pendu/Pendu.xcdatamodeld/Pendu.xcdatamodel/contents

@@ -2,10 +2,11 @@
 <model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="20086" systemVersion="21E258" minimumToolsVersion="Automatic" sourceLanguage="Swift" userDefinedModelVersionIdentifier="">
     <entity name="Scoreboard" representedClassName="Scoreboard" syncable="YES" codeGenerationType="class">
         <attribute name="categoryName" optional="YES" attributeType="String"/>
+        <attribute name="difficulty" optional="YES" attributeType="String"/>
         <attribute name="playerName" optional="YES" attributeType="String"/>
         <attribute name="score" optional="YES" attributeType="Integer 16" defaultValueString="0" usesScalarValueType="YES"/>
     </entity>
     <elements>
-        <element name="Scoreboard" positionX="-63" positionY="-18" width="128" height="74"/>
+        <element name="Scoreboard" positionX="-63" positionY="-18" width="128" height="89"/>
     </elements>
 </model>
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