pcb: remove gnd tracks, export, generate gcode

hardware/chairAdjust-relayBoard/pcb2gcode/millproject

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+# === USAGE ===
+# simply run pcb2gcode in terminal while being in this folder.
+# pcb2gcode will use "millproject" in current folder for parameters by default
+#
+# === Notes ===
+# web based gcode viewer:
+# https://ncviewer.com/
+
+
+# === CONFIG ===
+# Configuration file generated by pcb2gcodeGUI version 0.1 on Wed Apr 6 15:40:16 2022
+# stopped using gui and customized parameters manually since then...
+back=../export/chairAdjust-relayBoard-B_Cu.gbr
+front=../export/chairAdjust-relayBoard-F_Cu.gbr
+outline=../export/chairAdjust-relayBoard-Edge_Cuts.gbr
+#note: running for each drill file separately and merging the gcode manually (4 mounting holes are in a separate gerber file)
+drill=../export/chairAdjust-relayBoard-PTH.drl
+#drill=../export/chairAdjust-relayBoard-NPTH.drl
+
+output-dir=./out
+
+# Common options
+metric=true
+metricoutput=true
+mirror-axis=0.0000
+mirror-yaxis=false
+nog64=false
+
+#set optimized to default value, because when it was set to 0 (disable) it caused crash (runs till ram full) for some reason, since adding text to center of pcb ==> set to default
+optimise=0.00000254 #default
+backtrack=0 #if default/undefined caused unwanted moves in copper without retracting, especially at letters (seen in gcode viewer) - thus disabled this feature
+tile-x=1
+tile-y=1
+tolerance=0.0500
+zchange=30.0000
+zchange-absolute=false
+zero-start=true
+zsafe=3.5000 #3mm to be able to cross mounting screws
+
+# Mill options
+extra-passes=0
+mill-feed=400 #default 600mm/min
+mill-speed=20000
+offset=0.400 #intentional bigger offset than necessary, using 0.4 there were almost no small strips beeing left over between insolation lines.
+voronoi=false
+zwork=-0.2000 #usin 60degree cutter resulted in ~0.42mm line
+
+# Drill options
+drill-feed=200
+drill-side=back
+drill-speed=20000
+milldrill=false
+#@#milldrill-diameter=3.0000
+nog81=false
+nog91-1=true
+onedrill=false
+zdrill=-1.7500
+drills-available=0.8,1,1.5
+
+# Outline options
+bridges=1.0000
+bridgesnum=2
+cut-feed=200
+cut-infeed=0.5000
+cut-side=back
+cut-speed=10000
+cut-vertfeed=60
+cutter-diameter=0.0000 #not really cutting, just using line as reference for zeroing
+fill-outline=true
+zbridges=-0.6000
+zcut=-2.7000
+
+# Autoleveller options
+al-back=false
+al-front=false
+al-probecode=G31
+al-probefeed=100
+al-probevar=2002
+al-setzzero=G92 Z0
+al-x=15.0000
+al-y=15.0000
+software=custom
+