feat: behat 4.x compatibility

[atomiix]

Adds support for Behat 4.x, which drops two things this extension and its test suite relied on: YAML configuration and doc-block annotations (both replaced: config by PHP files, step/hook definitions by PHP 8 attributes).

Production change

• InitializedSymfonyExtensionEnvironment::bindCallee() now handles Behat 4's new LateBoundContextMethodCallable, binding it to the resolved context instance via bindTo(). This is the one code change needed for the extension itself to work under Behat 4 (per the changelog's "use explicit type for late-bound Context callable methods").

Test suite migration (Behat 4 dropped YAML config + annotations)

• Replaced behat.yml.dist with behat.dist.php using the new Config/Profile/Suite builder objects.
• Migrated TestContext from @Given/@When/@Then/@BeforeScenario annotations to #[Given]/#[When]/#[Then]/#[BeforeScenario] attributes.
• TestContext::thereIsConfiguration() now generates PHP config files (behat.php), eval-ing the inline PHP snippet into a Config object and persisting it via serialize()/unserialize() rather than parsing/dumping YAML.
• Updated all feature files to use PHP-based Behat configuration and attribute-based step definitions in their inline fixtures.

This PR depends on FriendsOfBehat/MinkExtension#58

[l-stauberg]

Is not compatible with behat 4 and symfony 8, not sure if this is wanted but definitely a heads up.

[atomiix]

@l-stauberg it’s kinda on purpose, there is already 5 PRs adding Symfony 8/Behat 4, I thought maybe we can merge them before and only add this one on top for full compatibility.

But I can definitely make the change as well if needed!

[l-stauberg]

Maybe we can just wait for #229

That should be fine then.