serialization: (minor thing) sort labels before serializing

- this makes the output XML easier to deal with when merging in git
- before, it would just add the latest labels towards the bottom, this keeps it sorted by SNES address
- doesn't affect the save data ver#, just the output
- re-saving with this will re-order labels in existing saves

Author: binary1230

Diz.Core.Interfaces/LabelInterfaces.cs

@@ -95,6 +95,8 @@ public interface ILabelProvider : IReadOnlyLabelProvider
 
     void SetAll(Dictionary<int, IAnnotationLabel> newLabels);
     void AppendLabels(Dictionary<int, IAnnotationLabel> newLabels, bool smartMerge = false);
+    
+    void SortLabels();
 }
 
 public interface IReadOnlyLabels

Diz.Core.Interfaces/ModelInterfaces.cs

@@ -175,7 +175,6 @@ public interface ILabelService :
         ILabelProvider,
         IReadOnlyLabelProvider
     {
-        
     }
 
     public interface ILabelServiceWithTempLabels : 

Diz.Core/model/LabelProvider.cs

@@ -267,6 +267,14 @@ public override int GetHashCode()
             return !Equals(left, right);
         }
         #endregion
+
+        public void SortLabels()
+        {
+            if (cachedLabels != null)
+                throw new InvalidOperationException("Cannot modify labels while cache is locked");
+
+            NormalProvider.SortLabels();
+        }
     }
 
     #if DIZ_3_BRANCH
@@ -354,7 +362,7 @@ public void AddLabel(int snesAddress, IAnnotationLabel labelToAdd, bool overwrit
     public class LabelsCollection : LabelProviderBase, ILabelService, IEquatable<LabelsCollection>
     {
         // ReSharper disable once MemberCanBePrivate.Global
-        public Dictionary<int, IAnnotationLabel> Labels { get; } = new();
+        public Dictionary<int, IAnnotationLabel> Labels { get; private set; } = new();
 
         [XmlIgnore]
         IEnumerable<KeyValuePair<int, IAnnotationLabel>> IReadOnlyLabelProvider.Labels => Labels;
@@ -415,6 +423,13 @@ public void AppendLabels(Dictionary<int, IAnnotationLabel> newLabels, bool smart
                 }
             }
         }
+        
+        public void SortLabels()
+        {
+            Labels = Labels
+                .OrderBy(x => x.Key)
+                .ToDictionary(x => x.Key, x => x.Value);
+        }
 
         public override IAnnotationLabel GetLabel(int snesAddress) => 
             Labels.GetValueOrDefault(snesAddress);

Diz.Core/serialization/xml_serializer/ProjectXMLSerializer.cs

@@ -118,6 +118,9 @@ public override byte[] Save(Project project)
             Watermark = DizWatermark,
             Project = project
         };
+        
+        // one silly thing. we'll re-sort labels so they show up in the output file in order.
+        project.Data.Labels.SortLabels();
 
         BeforeSerialize?.Invoke(this, rootElement);