util: add hex colors support in `styleText` #3619

Job	Run time
Build slim tarball	2m 41s
x86_64-linux: with shared libraries	23m 5s
aarch64-linux: with shared libraries	19m 42s
aarch64-darwin: with shared libraries	17m 57s
x86_64-darwin: with shared libraries	28m 12s
	1h 31m 37s

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