feat: Use `brand.yml` R package #3169

Job	Run time
routine / routine	6m 21s
website / pkgdown	4m 21s
R-CMD-check / setup	7s
R-CMD-check / ubuntu-latest (4.4.3)	3m 52s
R-CMD-check / windows-latest (4.5.1)	4m 32s
R-CMD-check / macOS-latest (4.5.1)	3m 41s
R-CMD-check / ubuntu-latest (devel)	2m 33s
R-CMD-check / ubuntu-latest (4.5.1)	2m 54s
R-CMD-check / ubuntu-latest (4.1.3)	2m 38s
R-CMD-check / ubuntu-latest (4.2.3)	3m 20s
R-CMD-check / ubuntu-latest (4.3.3)	2m 53s
Deploy to shinyapps.io	0s
	37m 12s

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