.gitignore files

firmware/.gitignore

@@ -0,0 +1,8 @@
+*.bin
+*.d
+*.elf
+*.hex
+*.list
+*.map
+*.o
+*.srec

hardware/.gitignore

@@ -0,0 +1,20 @@
+# kicad backup files
+*.000
+*.bak
+$savepcb.*
+
+# gerber and drill files
+*.gbl
+*.gtl
+*.gbr
+*.gbr
+*.gbs
+*.gts
+*.gbr
+*.gbo
+*.gto
+*.gtp
+*.drl
+
+# other kicad generated files
+*.csv