ns/nim: Stub eShop related calls (#1420)

* ns/nim: Stub eShop related calls

As we aren't able to process purchase on the eShop throught the emulator, I have:
- Stub IPurchaseEventManager::SetDefaultDeliveryTarget (with RE check).
- Implement IPurchaseEventManager::GetPurchasedEventReadableHandle (with RE check).

As we can't do any eShop async call throught the emulator, I have:
- Stub IShopServiceAccessServerInterface::CreateServerInterface
- Stub IShopServiceAccessServer::CreateAccessorInterface
- Stub IShopServiceAccessor::IShopServiceAsync

Close #1084 and #1322

* fix handle copy

* Fix align

* Fix readonly event

Ryujinx.HLE/HOS/Services/Nim/IShopServiceAccessServerInterface.cs

@@ -1,8 +1,22 @@
-namespace Ryujinx.HLE.HOS.Services.Nim
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Services.Nim.ShopServiceAccessServerInterface;
+
+namespace Ryujinx.HLE.HOS.Services.Nim
 {
     [Service("nim:eca")] // 5.0.0+
     class IShopServiceAccessServerInterface : IpcService
     {
         public IShopServiceAccessServerInterface(ServiceCtx context) { }
+
+        [Command(0)]
+        // CreateServerInterface(pid, handle<unknown>, u64) -> object<nn::ec::IShopServiceAccessServer>
+        public ResultCode CreateServerInterface(ServiceCtx context)
+        {
+            MakeObject(context, new IShopServiceAccessServer());
+
+            Logger.PrintStub(LogClass.ServiceNim);
+
+            return ResultCode.Success;
+        }
     }
 }