Add keyboard artwork, thanks thorwil

resources/bitmaps/keyboard/export.sh

@@ -0,0 +1,26 @@
+# TODO: split flattable from non-flattable PNGs
+
+IDs="
+white_bright_normal
+white_bright_hover
+white_bright_on_red
+white_bright_on_orange
+white_bright_on_green
+white_bright_on_blue
+white_dark_normal
+white_dark_hover
+white_dark_on_red
+white_dark_on_orange
+white_dark_on_green
+white_dark_on_blue
+black_normal
+black_hover
+black_on_red
+black_on_orange
+black_on_green
+black_on_blue
+"
+
+for ID in $IDs; do
+  inkscape keyboard.svg --export-id=$ID --export-png=$ID.png
+done