Introduce Ui_time_source module for clock management in UI applications:
create function to initialize a new clock with a specified start timeincr_clock function to access the Incremental clock within the Bonsai clockadvance_clock_by and advance_clock functions to move the current time forwardnow and watch_now for accessing the current time and an incremental node containing the timeat_intervals and at for creating incremental values that update based on time intervals or specific instantsuntil and sleep effects for delaying actions until a certain time or for a time spanwait_after_display effect for delaying actions until after the display lifecycle