Added RecursiveListScheduler and other small improvements/fixes

• Added a RecursiveListScheduler that schedules recursive loops before all the other operations.
• Small fixes/improvements made across Schedule/Scheduler/SchedulingGUI.
• Now scheduling non-recursive algorithms to schedule_time=1 should be possible.
• Updated examples in some cases that were wrong.

Closes: #325 (closed)

b_asic/scheduler_gui/main_window.py

@@ -893,7 +893,7 @@ class ScheduleMainWindow(QMainWindow, Ui_MainWindow):
         if self.schedule is None:
             return
         op: GraphComponent = cast(
-            GraphComponent, self.schedule.sfg.find_by_id(graph_id)
+            GraphComponent, self.schedule._sfg.find_by_id(graph_id)
         )
         si = self.info_table.rowCount()  # si = start index