Add "Print Pause" function

[cmorrow101]

Like many with older printers, mine continues to print after running out of filament. Adding the ability to pause printing when the reading reaches a predetermined weight would be brilliant.

[techman83]

That's a really cool idea! I don't think this would be incredibly difficult to achieve. Filament Runout Simplified would probably be a good starting place for the config options and how the pause is triggered.