Add SetVisible and SetAttribute methods to Node interface

This commit introduces two new methods, SetVisible and SetAttribute, to the Node interface. These methods allow toggling element visibility and setting attributes dynamically. Additionally, a helper function, escapeJavaScript, was added to ensure proper escaping of JavaScript strings.

node.go

@@ -1,6 +1,9 @@
 package extractor
 
 import (
+	"fmt"
+	"strings"
+
 	"github.com/playwright-community/playwright-go"
 )
 
@@ -17,6 +20,9 @@ type Node interface {
 	SelectFirst(selector string) Node
 
 	ForEach(selector string, fn func(Node) error) error
+
+	SetVisible(val bool) error
+	SetAttribute(name, value string) error
 }
 
 type node struct {
@@ -79,3 +85,17 @@ func (n node) ForEach(selector string, fn func(Node) error) error {
 
 	return nil
 }
+
+func (n node) SetVisible(val bool) error {
+	_, err := n.locator.Evaluate(fmt.Sprintf(`(element) => element.visible = %t;`, val), nil)
+	return err
+}
+
+func escapeJavaScript(s string) string {
+	return strings.Replace(strings.Replace(s, "\\", "\\\\", -1), "'", "\\'", -1)
+}
+
+func (n node) SetAttribute(name, value string) error {
+	_, err := n.locator.Evaluate(fmt.Sprintf(`(element) => element.setAttribute('%s', '%s');`, escapeJavaScript(name), escapeJavaScript(value)), nil)
+	return err
+}