Allow naming of exhaust fan for Klipper

[alidaf]

Is there an existing issue for this feature request?

• [X] I have searched the existing issues

Is your feature request related to a problem?

I have multiple machines with exhaust fans and Klipper allows these to be controlled via sliders. Orca forces the exhaust fan to be named P3 but this has no meaning in the interactive menus of Mainsail.

Which printers will be beneficial to this feature?

Klipper

Describe the solution you'd like

There should be an option to give the name of the exhaust fan to be passed to Klipper

Describe alternatives you've considered

No response

Additional context

No response

[alidaf]

Closed because I discovered that M106 parameter is fixed to Pn. Better to add an {% if fan = 'P3' %} function to Klipper to force the correct fan.