Move PCB's gitignore to subfolder

pcb/.gitignore

@@ -0,0 +1,47 @@
+
+# Created by https://www.gitignore.io/api/kicad
+# Edit at https://www.gitignore.io/?templates=kicad
+
+### KiCad ###
+# For PCBs designed using KiCad: http://www.kicad-pcb.org/
+# Format documentation: http://kicad-pcb.org/help/file-formats/
+
+*.blend1
+*.blend2
+*.blend3
+
+
+# Temporary files
+*.000
+*.bak
+*.bck
+*-bak
+*.kicad_pcb-bak
+*~
+_autosave-*
+*.tmp
+*-save.pro
+*-save.kicad_pcb
+fp-info-cache
+
+# Netlist files (exported from Eeschema)
+*.net
+
+# Autorouter files (exported from Pcbnew)
+*.dsn
+*.ses
+
+# Exported BOM files
+*.xml
+*.csv
+
+### KiCad Patch ###
+escue-backup/
+
+*.tsv
+bom/
+
+# Gerber export output
+out/
+
+# End of https://www.gitignore.io/api/kicad