Move solution and projects to src

src/Ryujinx.HLE/HOS/Applets/IApplet.cs

@@ -0,0 +1,28 @@
+using Ryujinx.HLE.HOS.Services.Am.AppletAE;
+using Ryujinx.HLE.Ui;
+using Ryujinx.Memory;
+using System;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Applets
+{
+    interface IApplet
+    {
+        event EventHandler AppletStateChanged;
+
+        ResultCode Start(AppletSession normalSession,
+                         AppletSession interactiveSession);
+
+        ResultCode GetResult();
+
+        bool DrawTo(RenderingSurfaceInfo surfaceInfo, IVirtualMemoryManager destination, ulong position)
+        {
+            return false;
+        }
+
+        static T ReadStruct<T>(ReadOnlySpan<byte> data) where T : unmanaged
+        {
+            return MemoryMarshal.Cast<byte, T>(data)[0];
+        }
+    }
+}