Add a kernel test for the bundle using nyholm/symfony-bundle-test

[loevgaard]

Summary

Adds tests/SetonoBotDetectionBundleTest.php, a kernel test built with nyholm/symfony-bundle-test. It boots a real kernel with FrameworkBundle, TwigBundle and this bundle, and checks:

• Services: the four services resolve to the right classes. As in GlsWebserviceBundle's kernel test, a test compiler pass makes the bundle's services public first, because Symfony removes unused private services when it compiles the container.
• Twig functions: is_bot() and is_bot_request() work through the container's real twig service, with a bot request on the request stack. The existing tests cover the extension and the service definitions only in isolation.

New dev dependencies:

• nyholm/symfony-bundle-test ^3.1, the first version that supports Symfony 8
• symfony/framework-bundle and symfony/twig-bundle, which the test uses directly, so the dependency analyser needs them declared

Test plan

Run locally:

Setup	PHPStan	PHPUnit (64 tests)
PHP 8.1, lowest (Symfony 6.4.0)	pass	pass
PHP 8.1, highest (Symfony 6.4)	pass	pass
PHP 8.3, lowest (Symfony 7.4.0)	pass	pass
PHP 8.4, lowest (Symfony 8.0.0)	pass	pass
PHP 8.4, highest (Symfony 8.1)	pass	pass

With lowest dependencies, the run also shows Twig's known PHPUnit deprecations and skipped legacy test. With Symfony 8.0 at lowest versions it additionally prints 7 PHP deprecations from old Symfony package versions installed alongside it. None of them fail the build.

• ECS, composer-normalize and the dependency analyser pass on PHP 8.4 with highest dependencies
• CI is green

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.00%. Comparing base (279f467) to head (ff2ce49).

Additional details and impacted files

@@            Coverage Diff            @@
##             master      #39   +/-   ##
=========================================
  Coverage     60.00%   60.00%           
  Complexity       13       13           
=========================================
  Files             5        5           
  Lines            90       90           
=========================================
  Hits             54       54           
  Misses           36       36           

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