Repeats and notification

[tarman3]

The program has a repeat option. This is very convenient when processing a large number of parts.
In order to change parts in time, it is necessary to continuously monitor the process.
It would be nice to have a sound notification before the end of the next cycle.

Perhaps a universal solution could be this:

• When there is a comment in gcode (for example, ;run_command_1), the command specified in the parameters will be executed.
• The user will be able to enter the command himself, for example, launching a console player
  (for example, mpv --no-terminal alarm.oga).

I've currently solved this problem using my own Python script that sends commands to grbl.
I would really like to see similar functionality in the LaserGRBL program.

Thank you for your work.