Add fileicon icos for windows

resources/bitmaps_png/icons/mk_file_icos.sh

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+#!/bin/bash
+#
+# make icons using Inkscape
+# inkscape (1.0.2 minimum) and icotool are necessary
+
+
+# create output directories
+rm -r tmp
+rm icon_*.png
+mkdir tmp
+mkdir tmp/16 tmp/24 tmp/32 tmp/48 tmp/64 tmp/256 tmp/ico
+echo "all directories created."
+cd ../../linux/icons/hicolor/scalable/mimetypes
+
+ICON_FILES="worksheet
+            symbol
+            schematic
+            project
+            pcb
+            footprint"
+
+# convert .svg files into .png files
+for fl in $ICON_FILES
+do
+    NAME=$fl
+    SOURCE_NAME="application-x-kicad-${fl}.svg"
+	inkscape -o ../../../../../bitmaps_png/icons/tmp/16/$NAME.png -w 16 -h 16 --export-area-snap $SOURCE_NAME
+	inkscape -o ../../../../../bitmaps_png/icons/tmp/24/$NAME.png -w 24 -h 24 --export-area-snap $SOURCE_NAME
+	inkscape -o ../../../../../bitmaps_png/icons/tmp/32/$NAME.png -w 32 -h 32 --export-area-snap $SOURCE_NAME
+	inkscape -o ../../../../../bitmaps_png/icons/tmp/48/$NAME.png -w 48 -h 48 --export-area-snap $SOURCE_NAME
+	inkscape -o ../../../../../bitmaps_png/icons/tmp/64/$NAME.png -w 64 -h 64 --export-area-snap $SOURCE_NAME
+	inkscape -o ../../../../../bitmaps_png/icons/tmp/256/$NAME.png -w 256 -h 256 --export-area-snap $SOURCE_NAME
+	echo "file $SOURCE_NAME converted."
+done
+
+# convert .png files into .ico files using "icotool" from icoutils
+# (see http://www.nongnu.org/icoutils/)
+cd ../../../../../bitmaps_png/icons
+for fl in $ICON_FILES
+do
+    NAME=${fl%.*} # strip the file extension
+    icotool -c tmp/16/$NAME.png tmp/24/$NAME.png tmp/32/$NAME.png tmp/48/$NAME.png \
+	tmp/64/$NAME.png tmp/256/$NAME.png -o tmp/ico/fileicon_$NAME.ico
+	echo "file $fl converted in .ico file."
+done
+
+# make mosaic images locally
+montage tmp/64/*.png -geometry +6+6 -tile x1 all.png
+echo "mosaic images created"
+
+# delete what is not needed
+cp tmp/ico/* ./
+rm -R tmp
+