util: add hex colors support in `styleText` #2750

Job	Run time
Build slim tarball	1m 33s
aarch64-darwin: with shared libraries	35m 59s
x86_64-darwin: with shared libraries	46m 21s
aarch64-linux: with shared libraries	22m 49s
x86_64-linux: with shared libraries	27m 36s
	2h 14m 18s

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