update repo structure for future pcb-v5

pcb/pcb-v4/#KICAD5

pcb/pcb-v4/3D-bottom_view.png

pcb/pcb-v4/3D-top_view.png

pcb/pcb-v4/README.txt

pcb/pcb-v4/fp-info-cache

pcb/pcb-v4/fp-lib-table

pcb/pcb-v4/neOSensor-v4-schematic.pdf

pcb/pcb-v4/neOSensorV4_panel-B.Cu.gbl

pcb/pcb-v4/neOSensorV4_panel-B.Mask.gbs

pcb/pcb-v4/neOSensorV4_panel-B.SilkS.gbo

pcb/pcb-v4/neOSensorV4_panel-Edge.Cuts.gm1

pcb/pcb-v4/neOSensorV4_panel-F.Cu.gtl

pcb/pcb-v4/neOSensorV4_panel-F.Mask.gts

pcb/pcb-v4/neOSensorV4_panel-F.SilkS.gto

pcb/pcb-v4/neOSensorV4_panel.drl

pcb/pcb-v4/neOSensorV4_panel.kicad_pcb

pcb/pcb-v4/neOSensorV4_panel.kicad_pcb-bak

pcb/pcb-v4/neOSensorV4_panel.pro

pcb/pcb-v4/neOSensorV4_panel.zip

pcb/pcb-v4/neosensor_addon.bck