Re-organize all projects (#4166)

Content.Server/Access/AccessReaderChangeMessage.cs

@@ -0,0 +1,17 @@
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Access
+{
+    public sealed class AccessReaderChangeMessage : EntityEventArgs
+    {
+        public IEntity Sender { get; }
+
+        public bool Enabled { get; }
+
+        public AccessReaderChangeMessage(IEntity entity, bool enabled)
+        {
+            Sender = entity;
+            Enabled = enabled;
+        }
+    }
+}