refactored data-types to reduce plugin sizes

operator-range.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"
 )
 
 // -------- range term
@@ -60,7 +61,7 @@ func evalRange(ctx kern.ExprContext, opTerm *scan.Term) (v any, err error) {
 	} else if leftValue, rightValue, err = opTerm.EvalInfix(ctx); err != nil {
 		return
 	}
-	if !(kern.IsInteger(leftValue) && kern.IsInteger(rightValue)) {
+	if !(types.IsInteger(leftValue) && types.IsInteger(rightValue)) {
 		// err = opTerm.errIncompatibleTypes(leftValue, rightValue)
 		err = errRangeInvalidSpecification(opTerm)
 		return