Add withCount support

[SergeAntonets]

• See: Support withCount in ResponseFromApiResource #620
• Laravel: https://laravel.com/docs/6.x/eloquent-relationships#counting-related-models
• The "whenCounted" method was introduced in Laravel v9. See: [9.x] Add whenCounted to JsonResource laravel/framework#43101

This PR adds withCount to the ResponseFromApiResource and will be supported by the factoryCreate model source

[SergeAntonets]

Hi @shalvah, I am finalizing the PR and want to add some test coverage, but it actually requires adding a database to test the "withCount" feature. Additionally, I don't see any tests related to the "with" feature, likely because it also requires a database, which might be why it's missing.

Any thouths/suggestions around this? thanks

[shalvah]

There are some tests that do use a database (SQLite in memory). We even have migrations. Example:

scribe/tests/Unit/ValidationRuleParsingTest.php

Lines 45 to 47 in 4d4a44e

	Schema::create('users', function ($table) {
	$table->id();
	});

You can follow the example.

[SergeAntonets]

@shalvah, thanks. I missed that. The PR is ready; please take a look whenever you have time.

[shalvah]

Is the withCount() method not supported on older Laravel versions? If so, you can skip the test using something like

scribe/tests/Strategies/GetFromInlineValidatorTest.php

Lines 235 to 237 in 46e8399

	if (phpversion() < 8.1) {
	$this->markTestSkipped('Enums are only supported in PHP 8.1 or later');
	}

. I've forgotten how, but Laravel provides a method to get the framework version.

[SergeAntonets]

@shalvah fixed! The "whenCounted" method was introduced in Laravel v9. See: laravel/framework#43101

PS: added a few more checks