add ws2812 4 channels for RGBW strips + diagnostic output #396

Job	Run time
doc_check	3s
build_luac_cross_win	1m 35s
luacheck (linux, ubuntu-20.04)	13s
build (51, float)	1m 2s
luacheck (windows, windows-latest)	21s
build (53, float)	59s
build (51, integral)	58s
build (53, 64bit)	57s
NTest (51, float)	4s
compile_lua (51, float, cat)	7s
NTest (53, float)	6s
compile_lua (53, float, cat)	4s
NTest (51, integral)	4s
compile_lua (51, integral, grep -v "lua_modules/lm92/lm92.lua\\|lua_modules/hdc1000/HDC1000.lua\\|l...	3s
NTest (53, 64bit)	8s
compile_lua (53, 64bit, cat)	8s
compile_lua_win (51, float, cat)	14s
NTest_win (51, float)	14s
	7m 20s

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