Déplacement des tests dans le dossier correspondant

README.md

docs/01_decouverte_des_bases.md

test/article_01/autodispose_test.dart

test/article_01/change_notifier_provider_test.dart

test/article_01/circle_of_life_test.dart

test/article_01/circular_dependency_test.dart

test/article_01/family_test.dart

test/article_01/future_provider_test.dart

test/article_01/listener_test.dart

test/article_01/overrides_test.dart

test/article_01/provider_test.dart

test/article_01/select_test.dart

test/article_01/state_notifier_provider_test.dart

test/article_01/state_provider_test.dart

test/article_01/stream_provider_test.dart

test/article_01/watch_test.dart