feat(translate): translate a whole playlist

autotests/CMakeLists.txt

@@ -34,3 +34,8 @@ ecm_add_test(mediainfotest.cpp
     TEST_NAME mediainfotest
     LINK_LIBRARIES qtpotato_core Qt6::Test
 )
+
+ecm_add_test(subtitleextractortest.cpp
+    TEST_NAME subtitleextractortest
+    LINK_LIBRARIES qtpotato_core Qt6::Test
+)