refactor: Move essais tests to PHPUnit

tests/Distant/NeedProxyTest.php

tests/Distant/UrlToAsciiTest.php

tests/Distant/ValiderUrlDistanteTest.php

tests/Filtre/AffdateCourtTest.php

tests/Filtre/AffdateHeureTest.php

tests/Filtre/AffdateJourcourtTest.php

tests/Filtre/AffdateMoisAnneeTest.php

tests/Filtre/AjouterClassTest.php

tests/Filtre/AnneeTest.php

tests/Filtre/AntispamTest.php

tests/Filtre/AppliquerFiltreTest.php

tests/Filtre/ChercherFiltreTest.php

tests/Filtre/CommuterClassTest.php

tests/Filtre/CorrigerEntitesHtmlTest.php

tests/Filtre/DateIcalTest.php

tests/Filtre/DateInterfaceTest.php

tests/Filtre/DateRelativeTest.php

tests/Filtre/DivTest.php

tests/Filtre/EchapperTagsTest.php

tests/Filtre/ExtraireMultiTest.php