feat: add MultipleOptionsTask

This is a variation of a Sequential Task, in which a subtask failing
will prompt the next one to execute, and a subtask being successful will
stop the task.

This way, this can be used for easily managing fallbacks with tasks. :D

Signed-off-by: flow <flowlnlnln@gmail.com>

launcher/CMakeLists.txt

@@ -397,6 +397,8 @@ set(TASKS_SOURCES
     tasks/ConcurrentTask.cpp
     tasks/SequentialTask.h
     tasks/SequentialTask.cpp
+    tasks/MultipleOptionsTask.h
+    tasks/MultipleOptionsTask.cpp
 )
 
 ecm_add_test(tasks/Task_test.cpp LINK_LIBRARIES Launcher_logic Qt${QT_VERSION_MAJOR}::Test