Updated to .NET 7.0 and added Jenkinsfile.

GameServiceWarden/GameServiceWarden.Core/Persistence/IPersistent.cs

@@ -0,0 +1,14 @@
+using System.Collections.Generic;
+using GameServiceWarden.Core.Module;
+
+namespace GameServiceWarden.Core.Persistence
+{
+    public interface IPersistent<V> : IReadOnlyPersistent<V>
+    {
+        new V this[string key] { get; set; }
+
+        void AddToPersistence(string key, V value);
+        void Clear();
+        bool Delete(string key);
+    }
+}