refactored data-types to reduce plugin sizes

operator-context.go

@@ -9,6 +9,7 @@ import (
 
 	"git.portale-stac.it/go-pkg/expr/kern"
 	"git.portale-stac.it/go-pkg/expr/scan"
+	"git.portale-stac.it/go-pkg/expr/types/list"
 )
 
 //-------- context term
@@ -48,7 +49,7 @@ func evalContextValue(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error
 		}
 		if err == nil {
 			var item any
-			values := kern.NewLinkedListA()
+			values := list.NewLinkedListA()
 			for item, err = it.Next(); err == nil; item, err = it.Next() {
 				values.PushBack(item)
 			}