Refactor IPC services to have commands into separate classes, fix readme url

Ryujinx.Core/OsHle/IpcServices/Apm/ServiceApm.cs

@@ -0,0 +1,29 @@
+using Ryujinx.Core.OsHle.Ipc;
+using System.Collections.Generic;
+
+using static Ryujinx.Core.OsHle.IpcServices.ObjHelper;
+
+namespace Ryujinx.Core.OsHle.IpcServices.Apm
+{
+    class ServiceApm : IIpcService
+    {
+        private Dictionary<int, ServiceProcessRequest> m_Commands;
+
+        public IReadOnlyDictionary<int, ServiceProcessRequest> Commands => m_Commands;
+
+        public ServiceApm()
+        {
+            m_Commands = new Dictionary<int, ServiceProcessRequest>()
+            {
+                { 0, OpenSession }
+            };
+        }
+
+        public long OpenSession(ServiceCtx Context)
+        {
+            MakeObject(Context, new ISession());
+
+            return 0;
+        }
+    }
+}