Add files to the resource file system

The device name of the resource file system in lib kilipili is "rsrc:".

Add files and folders to directory "in/".
Add filters to "make_rsrc.txt" as needed. (see github.com/Megatokio/kilipili/wiki)

build kilipili/desktop_tools/CMakeLists.txt:
	cd kilipili/desktop_tools
	mkdir build
	cd build
	rm -rf *
	export PICO_SDK_PATH=../../../../pico-sdk
	cmake -DCMAKE_BUILD_TYPE=Debug -DPICO_BOARD=NAME_OF_YOUR_BOARD -DMAKE_TOOLS=1 ..
	make

Run RsrcFileWriter:
	cd THIS_DIRECTORY
	../kilipili/desktop_tools/build/RsrcFileWriter make_rsrc.txt

	ok, that's a little bit awkward. You may copy RsrcFileWriter to /local/bin first.

	this copys and converts files from "in/" to "out/" or whatever you set in make_rsrc.txt.