Find Qt Test package

Author: adazem009

build/FindQt.cmake

@@ -1,6 +1,10 @@
 find_package(Qt6 6.6 COMPONENTS Gui Qml Quick REQUIRED)
 set(QT_LIBS Qt6::Gui Qt6::Qml Qt6::Quick)
 
+if (SCRATCHCPPGUI_BUILD_UNIT_TESTS)
+    find_package(Qt6 6.6 COMPONENTS Test REQUIRED)
+endif()
+
 function(linkQt TARGET)
     target_link_libraries(${TARGET} PRIVATE ${QT_LIBS})
 endfunction()