feat(natu): report expected let order

src/natu/parser.rs

@@ -43,6 +43,7 @@ fn convert_expr(expr: rnix::ast::Expr) -> ast::Expr {
     match expr {
         rnix::ast::Expr::Ident(ident) => ast::Expr::Ident(ident.into()),
         rnix::ast::Expr::LetIn(let_in) => ast::Expr::Let {
+            range: let_in.syntax().text_range().into(),
             bindings: let_in
                 .attrpath_values()
                 .filter_map(convert_binding_ast)