fix: register interfaces for provided services

Dalamud.Injector/Hacks.cs

@@ -0,0 +1,20 @@
+using System;
+
+// ReSharper disable once CheckNamespace
+namespace Dalamud;
+
+// TODO: Get rid of this! Move StartInfo to another assembly, make this good
+
+/// <summary>
+/// Class to initialize Service&lt;T&gt;s.
+/// </summary>
+internal static class ServiceManager
+{
+    /// <summary>
+    /// Indicates that the class is a service.
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Class)]
+    public class Service : Attribute
+    {
+    }
+}