ceoloide/ergogen-footprints

AI Summary: This feature request proposes adding 'keep out zones' to Ergogen, enabling users to define areas where traces and vias should be excluded, primarily for antenna placement on Bluetooth keyboards. These zones should support front and/or back layers and ideally be rectangular, though a more flexible quadrilateral shape is also suggested. The aim is to manage these exclusion zones directly within Ergogen rather than in KiCad.