Add Test Mode to Debug Settings

[FormerLurker]

Print in Test Mode

Add an option within the debug settings to allow the user to test their camera settings on their actual GCode file, without extruding any filament or heating up the bed/nozzle. This will also make debugging faster.

Requires that we strip off all commands that move the extruder in any way, and that we completely suppress any commands that heat up the bed or nozzle, or switch tools. All of these commands should be sent to our position tracker BEFORE being stripped or suppressed.

[FormerLurker]

This has been added!