Shader: Add support for custom functions calls (and better handle intrinsics)

include/Nazara/Shader/Ast/AstSerializer.hpp

@@ -27,6 +27,8 @@ namespace Nz::ShaderAst
 			void Serialize(AccessMemberIndexExpression& node);
 			void Serialize(AssignExpression& node);
 			void Serialize(BinaryExpression& node);
+			void Serialize(CallFunctionExpression& node);
+			void Serialize(CallMethodExpression& node);
 			void Serialize(CastExpression& node);
 			void Serialize(ConditionalExpression& node);
 			void Serialize(ConstantExpression& node);