util: add hex colors support in `styleText` #4953

Job	Run time
Build slim tarball	2m 45s
x86_64-linux: with shared libraries	20m 40s
x86_64-darwin: with shared libraries	27m 5s
aarch64-linux: with shared libraries	18m 33s
aarch64-darwin: with shared libraries	18m 0s
	1h 27m 3s

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