Make good use of the dormant door sensor

[GuzziRaz]

Is your feature request related to a problem? Please describe.

You really should add some use of that door switch we've got. Along with existing issues #306, #427 I think another good use would be to (optionally) turn the chamber fan off when door is open, as that particular fan will only add noise in that case. Noise bad, automata good 😉

Describe the solution you'd like

Preferences (a couple of check boxes) for how to react to an open door. For example:

• Pause printer (eg. for workplace or children safety). Please note that this can be mandatory for some environments! Optionally resume when door is closed (otherwise manual resume).
• Turn off chamber fan when door is open, resume it when door is again closed. This is for decreasing fan noise. Perhaps if the chamber temp sensor reads close to vitrification temperature, ignore the setting and run the fan at full speed anyway.
• Great idea from #1473: Refuse to start a new print if the door has not been opened since the last print finished. Obviously with an option to override (eg. if print was removed when printer had no power).

Describe alternatives you've considered

Additional context

[GuzziRaz]

Another good option requested in #2759. Optionally turn on chamber light when door is open:

• When door opens, store chamber light state, turn it on if it wasn't already.
• When door closes, reset to stored state.