Initial support for image stores, support texture sample on compute

Ryujinx.Graphics.Shader/Decoders/ImageComponents.cs

@@ -0,0 +1,11 @@
+namespace Ryujinx.Graphics.Shader.Decoders
+{
+    enum ImageComponents
+    {
+        Red   = 1 << 0,
+        Green = 1 << 1,
+        Blue  = 1 << 2,
+        Alpha = 1 << 3
+
+    }
+}