huge commit for advanced stats feature.

broke data out into its own library.
may be breaking changes with existing plugins

Data/Models/SharedEntity.cs

@@ -0,0 +1,37 @@
+using Data.Abstractions;
+using System.Collections.Concurrent;
+
+namespace Data.Models
+{
+    public class SharedEntity : IPropertyExtender
+    {
+        private readonly ConcurrentDictionary<string, object> _additionalProperties;
+
+        /// <summary>
+        /// indicates if the entity is active
+        /// </summary>
+        public bool Active { get; set; } = true;
+
+        public SharedEntity()
+        {
+            _additionalProperties = new ConcurrentDictionary<string, object>();
+        }
+
+        public T GetAdditionalProperty<T>(string name)
+        {
+            return _additionalProperties.ContainsKey(name) ? (T)_additionalProperties[name] : default;
+        }
+
+        public void SetAdditionalProperty(string name, object value)
+        {
+            if (_additionalProperties.ContainsKey(name))
+            {
+                _additionalProperties[name] = value;
+            }
+            else
+            {
+                _additionalProperties.TryAdd(name, value);
+            }
+        }
+    }
+}