Add ability to ramp up fans over specified number of layers.

[halofx]

Problem
PrusaSlicer and Cura both have the ability to delay the fan for the first X number of layers, and then ramp up to a specified speed at another given layer height. This can be very helpful when printing PLA on a textured PEI sheet, as the default is on the P1P. Too much cooling at lower heights can shock the print off the PEI.

Solution
Restore the default behavior from PrusaSlicer.

Workaround
In the meantime, I have been having to manually add in M106 custom gcode commands to manually ramp up the fan speeds to avoid blasting small PLA parts off the textured PEI.

[github-actions]

GitHub bot: this issue is stale because it has been open for 90 days with no activity.

[github-actions]

GitHub bot: This issue was closed because it has been inactive for 7 days since being marked as stale.

[pirate]

Bump