docs: update docs

Author: mkafonso

README.md

@@ -46,22 +46,23 @@ import (
 	"github.com/mkafonso/schema/pkg/validator"
 )
 
-func ValidateStringExample() {
-	input := "Luna"
+func ValidateEmailExample() {
+	input := "[email protected]"
 
 	// Defining a validation schema
 	stringValidator := validator.NewStringValidator().
-		MinLength(5, "The string must be at least 5 characters long"). // Sets minimum length constraint
-		MaxLength(50, "The string must be at most 50 characters long") // Sets maximum length constraint
+		MinLength(5, "A string deve ter no mínimo 5 caracteres").   // Sets minimum length constraint
+		MaxLength(50, "A string deve ter no máximo 50 caracteres"). // Sets maximum length constraint
+		IsEmail("Formato de email inválido")                        // Validates as an email format
 
 	// Validating the input
 	result := stringValidator.Validate(input)
 
 	// Handling validation result
 	if result.IsValid {
-		fmt.Println("String validation successful!") // Message for successful validation
+		fmt.Println("Validation successful!") // Message for successful validation
 	} else {
-		fmt.Println("String validation error:", result.Errors) // Printing validation errors
+		fmt.Println("Validation error:", result.Errors) // Printing validation errors
 	}
 }
 ```