Add XML documentation to Ryujinx.Graphics.Gpu.Memory

Ryujinx.Graphics.Gpu/Memory/IRange.cs

@@ -1,5 +1,9 @@
 namespace Ryujinx.Graphics.Gpu.Memory
 {
+    /// <summary>
+    /// Range of memory.
+    /// </summary>
+    /// <typeparam name="T">GPU resource type</typeparam>
     interface IRange<T>
     {
         ulong Address { get; }