Horizon: Impl Prepo, Fixes bugs, Clean things (#4220)

* Horizon: Impl Prepo, Fixes bugs, Clean things

* remove ToArray()

* resultCode > status

* Remove old services

* Addresses gdkchan's comments and more cleanup

* Addresses Gdkchan's feedback 2

* Reorganize services, make sure service are loaded before guest

Co-Authored-By: gdkchan <5624669+gdkchan@users.noreply.github.com>

* Create interfaces for lm and sm

Co-authored-by: gdkchan <5624669+gdkchan@users.noreply.github.com>

Ryujinx.Horizon/Sm/Ipc/UserService.cs

@@ -0,0 +1,66 @@
+using Ryujinx.Horizon.Common;
+using Ryujinx.Horizon.Sdk.Sf;
+using Ryujinx.Horizon.Sdk.Sm;
+using Ryujinx.Horizon.Sm.Impl;
+
+namespace Ryujinx.Horizon.Sm.Ipc
+{
+    partial class UserService : IUserService
+    {
+        private readonly ServiceManager _serviceManager;
+
+        private ulong _clientProcessId;
+        private bool  _initialized;
+
+        public UserService(ServiceManager serviceManager)
+        {
+            _serviceManager = serviceManager;
+        }
+
+        [CmifCommand(0)]
+        public Result Initialize([ClientProcessId] ulong clientProcessId)
+        {
+            _clientProcessId = clientProcessId;
+            _initialized     = true;
+
+            return Result.Success;
+        }
+
+        [CmifCommand(1)]
+        public Result GetService([MoveHandle] out int handle, ServiceName name)
+        {
+            if (!_initialized)
+            {
+                handle = 0;
+
+                return SmResult.InvalidClient;
+            }
+
+            return _serviceManager.GetService(out handle, _clientProcessId, name);
+        }
+
+        [CmifCommand(2)]
+        public Result RegisterService([MoveHandle] out int handle, ServiceName name, int maxSessions, bool isLight)
+        {
+            if (!_initialized)
+            {
+                handle = 0;
+
+                return SmResult.InvalidClient;
+            }
+
+            return _serviceManager.RegisterService(out handle, _clientProcessId, name, maxSessions, isLight);
+        }
+
+        [CmifCommand(3)]
+        public Result UnregisterService(ServiceName name)
+        {
+            if (!_initialized)
+            {
+                return SmResult.InvalidClient;
+            }
+
+            return _serviceManager.UnregisterService(_clientProcessId, name);
+        }
+    }
+}