Adding cvar to enable light type variant selection in the loft project.

Signed-off-by: Ken Pruiksma <[email protected]>

Project/Registry/cvars.setreg

@@ -0,0 +1,9 @@
+{   
+    "O3DE": {
+        "Autoexec" : {
+            "ConsoleCommands" : {
+                "r_enablePerMeshShaderOptionFlags": true
+            }
+        }
+    }
+}