Throw an exception if GetCoreTypesFor() does not match a known core type.

Author: mwadams

Solutions/Corvus.Json.CodeGeneration/Corvus.Json.CodeGeneration/Types/Types.cs

@@ -56,6 +56,6 @@ public static CoreTypes GetCoreTypesFor(JsonElement typeValue)
             return CoreTypes.Integer;
         }
 
-        return CoreTypes.None;
+        throw new InvalidOperationException($"Unrecognized core type: {typeValue}");
     }
 }