chore: initialize standalone UPM package

DataSaverEvents.cs

@@ -0,0 +1,63 @@
+using System;
+using ShrinkEventBus;
+
+namespace ShrinkDataSaver.Integration
+{
+    public class SettingsChangedEvent : IShrinkEvent
+    {
+        public string Key { get; internal set; }
+        public object Value { get; internal set; }
+        public T Get<T>() => (T)Convert.ChangeType(Value, typeof(T));
+    }
+
+    public class SaveStartedEvent : IShrinkEvent
+    {
+        public int SlotIndex { get; internal set; }
+        public long Timestamp { get; internal set; }
+    }
+
+    public class SaveCompletedEvent : IShrinkEvent
+    {
+        public int SlotIndex { get; internal set; }
+        public string[] ModuleNames { get; internal set; }
+        public long Timestamp { get; internal set; }
+    }
+
+    public class SaveFailedEvent : IShrinkEvent
+    {
+        public int SlotIndex { get; internal set; }
+        public string ErrorMessage { get; internal set; }
+    }
+
+    public class LoadStartedEvent : IShrinkEvent
+    {
+        public int SlotIndex { get; internal set; }
+        public long Timestamp { get; internal set; }
+    }
+
+    public class LoadCompletedEvent : IShrinkEvent
+    {
+        public int SlotIndex { get; internal set; }
+        public string[] ModuleNames { get; internal set; }
+        public int Version { get; internal set; }
+        public long Timestamp { get; internal set; }
+    }
+
+    public class LoadFailedEvent : IShrinkEvent
+    {
+        public int SlotIndex { get; internal set; }
+        public string ErrorMessage { get; internal set; }
+    }
+
+    public class MigrationCompletedEvent : IShrinkEvent
+    {
+        public int SlotIndex { get; internal set; }
+        public int FromVersion { get; internal set; }
+        public int ToVersion { get; internal set; }
+    }
+
+    public class SlotDeletedEvent : IShrinkEvent
+    {
+        public int SlotIndex { get; internal set; }
+    }
+}