Rename Ryujinx.Core to Ryujinx.HLE and add a separate project for a future LLE implementation

Ryujinx.HLE/OsHle/Utilities/EndianSwap.cs

@@ -0,0 +1,7 @@
+namespace Ryujinx.HLE.OsHle.Utilities
+{
+    static class EndianSwap
+    {
+        public static short Swap16(short Value) => (short)(((Value >> 8) & 0xff) | (Value << 8));
+    }
+}