Inject controllers and services

Core/Controllers/HandBookController.cs

@@ -1,10 +1,13 @@
+using Core.Annotations;
+
 namespace Core.Controllers;
 
 // TODO: This seems unused, is it even needed?
+[Injectable]
 public class HandBookController
 {
     public void Load()
     {
         throw new NotImplementedException();
     }
-}
+}