feat: introduce helper method to describe supported date formats

```php
(new \CuyZ\Valinor\MapperBuilder())
    // Both `Cookie` and `ATOM` formats will be accepted
    ->supportDateFormats(DATE_COOKIE, DATE_ATOM)
    ->mapper()
    ->map(DateTimeInterface::class, 'Monday, 08-Nov-1971 13:37:42 UTC');
```

docs/pages/other/dealing-with-dates.md

@@ -5,14 +5,12 @@ supported. By default, any valid timestamp or ATOM-formatted value will be
 accepted.
 
 If other formats are to be supported, they need to be registered using the
-following constructor:
+following method:
 
 ```php
 (new \CuyZ\Valinor\MapperBuilder())
     // Both `Cookie` and `ATOM` formats will be accepted
-    ->registerConstructor(
+    ->supportDateFormats(DATE_COOKIE, DATE_ATOM)
-        new \CuyZ\Valinor\Mapper\Object\DateTimeFormatConstructor(DATE_COOKIE, DATE_ATOM)
-    )
     ->mapper()
     ->map(DateTimeInterface::class, 'Monday, 08-Nov-1971 13:37:42 UTC');
 ```

src/Mapper/Object/DateTimeFormatConstructor.php

@@ -26,7 +26,7 @@ use DateTimeInterface;
  *     ->map(DateTimeInterface::class, 'Monday, 08-Nov-1971 13:37:42 UTC');
  * ```
  *
- * @api
+ * @internal
  */
 final class DateTimeFormatConstructor
 {

src/MapperBuilder.php

@@ -7,6 +7,7 @@ namespace CuyZ\Valinor;
 use CuyZ\Valinor\Cache\FileSystemCache;
 use CuyZ\Valinor\Library\Container;
 use CuyZ\Valinor\Library\Settings;
+use CuyZ\Valinor\Mapper\Object\DateTimeFormatConstructor;
 use CuyZ\Valinor\Mapper\Tree\Message\ErrorMessage;
 use CuyZ\Valinor\Mapper\TreeMapper;
 use Psr\SimpleCache\CacheInterface;
@@ -172,6 +173,28 @@ final class MapperBuilder
         return $clone;
     }
 
+    /**
+     * Describes which date formats will be supported during mapping.
+     *
+     * By default, the dates will accept any valid timestamp or ATOM-formatted
+     * value.
+     *
+     * ```php
+     * (new \CuyZ\Valinor\MapperBuilder())
+     *     // Both `Cookie` and `ATOM` formats will be accepted
+     *     ->supportDateFormats(DATE_COOKIE, DATE_ATOM)
+     *     ->mapper()
+     *     ->map(DateTimeInterface::class, 'Monday, 08-Nov-1971 13:37:42 UTC');
+     * ```
+     *
+     * @param non-empty-string $format
+     * @param non-empty-string ...$formats
+     */
+    public function supportDateFormats(string $format, string ...$formats): self
+    {
+        return $this->registerConstructor(new DateTimeFormatConstructor($format, ...$formats));
+    }
+
     /**
      * Inject a cache implementation that will be in charge of caching heavy
      * data used by the mapper.

tests/Integration/Mapping/Object/DateTimeMappingTest.php

@@ -5,7 +5,6 @@ declare(strict_types=1);
 namespace CuyZ\Valinor\Tests\Integration\Mapping\Object;
 
 use CuyZ\Valinor\Mapper\MappingError;
-use CuyZ\Valinor\Mapper\Object\DateTimeFormatConstructor;
 use CuyZ\Valinor\MapperBuilder;
 use CuyZ\Valinor\Tests\Integration\IntegrationTest;
 use DateTimeInterface;
@@ -55,7 +54,7 @@ final class DateTimeMappingTest extends IntegrationTest
     {
         try {
             $result = (new MapperBuilder())
-                ->registerConstructor(new DateTimeFormatConstructor('d/m/Y', 'Y/m/d'))
+                ->supportDateFormats('d/m/Y', 'Y/m/d')
                 ->mapper()
                 ->map(DateTimeInterface::class, '2022/08/05');
         } catch (MappingError $error) {
@@ -83,7 +82,7 @@ final class DateTimeMappingTest extends IntegrationTest
     {
         try {
             (new MapperBuilder())
-                ->registerConstructor(new DateTimeFormatConstructor('Y/m/d'))
+                ->supportDateFormats('Y/m/d')
                 ->mapper()
                 ->map(DateTimeInterface::class, 'invalid datetime');
         } catch (MappingError $exception) {