doc: Updates README.md.

Author: gustavofreze

README.md

@@ -27,15 +27,11 @@ composer require tiny-blocks/mapper
 
 ## How to use
 
-### Object
+The examples demonstrate how to create objects from iterables, map objects to arrays, and convert objects to JSON.
 
-The library exposes available behaviors through the `ObjectMapper` interface, and the implementation of these behaviors
-through the `ObjectMappability` trait.
+### Create an object from an iterable
 
-#### Create an object from an iterable
-
-You can map data from an iterable (such as an array) into an object. Here's how to map a `Shipping` object from an
-iterable:
+First, define your classes using the `ObjectMapper` interface and `ObjectMappability` trait:
 
 ```php
 <?php
@@ -47,17 +43,22 @@ namespace Example;
 use TinyBlocks\Mapper\ObjectMappability;
 use TinyBlocks\Mapper\ObjectMapper;
 
-final readonly class Shipping implements ObjectMapper
+final readonly class ShippingAddress implements ObjectMapper
 {
     use ObjectMappability;
 
-    public function __construct(public int $id, public ShippingAddresses $addresses)
-    {
+    public function __construct(
+        private string $city,
+        private ShippingState $state,
+        private string $street,
+        private int $number,
+        private ShippingCountry $country
+    ) {
     }
 }
 ```
 
-Next, define a `ShippingAddresses` class that is iterable:
+Next, define a collection class implementing `IterableMapper`:
 
 ```php
 <?php
@@ -66,28 +67,41 @@ declare(strict_types=1);
 
 namespace Example;
 
-use ArrayIterator;use IteratorAggregate;use TinyBlocks\Mapper\ObjectMappability;use TinyBlocks\Mapper\ObjectMapper;use Traversable;
+use TinyBlocks\Collection\Collection;
+use TinyBlocks\Mapper\IterableMappability;
+use TinyBlocks\Mapper\IterableMapper;
 
-final class ShippingAddresses implements ObjectMapper, IteratorAggregate
+final class ShippingAddresses extends Collection implements IterableMapper
 {
-    use ObjectMappability;
-
-    /**
-     * @var \TinyBlocks\Mapper\Models\ShippingAddress[] $elements
-     */
-    private iterable $elements;
+    use IterableMappability;
 
-    public function __construct(iterable $elements = [])
+    public function getType(): string
     {
-        $this->elements = is_array($elements) ? $elements : iterator_to_array($elements);
+        return ShippingAddress::class;
     }
+}
+```
+
+Finally, create a class that uses the collection:
+
+```php
+<?php
 
-    public function getIterator(): Traversable
+declare(strict_types=1);
+
+namespace Example;
+
+use TinyBlocks\Mapper\ObjectMappability;
+use TinyBlocks\Mapper\ObjectMapper;
+
+final readonly class Shipping implements ObjectMapper
+{
+    use ObjectMappability;
+
+    public function __construct(public int $id, public ShippingAddresses $addresses)
     {
-        return new ArrayIterator($this->elements);
     }
 }
-
 ```
 
 Now you can map data into a `Shipping` object using `fromIterable`:
@@ -111,7 +125,7 @@ $shipping = Shipping::fromIterable(iterable: [
 ]);
 ```
 
-#### Map object to array
+### Map object to array
 
 Once the object is created, you can easily convert it into an array representation.
 
@@ -136,7 +150,7 @@ This will output the following array:
 ]
 ```
 
-#### Map object to JSON
+### Map object to JSON
 
 Similarly, you can convert the object into a JSON representation.