[R-package] add a tree plotting function #9502

Job	Run time
r-package (clang16, R-devel)	16m 54s
r-package (ubuntu-latest, gcc, R 4.3, cmake)	13m 17s
r-package (clang17, R-devel)	16m 48s
r-package (ubuntu-latest, clang, R 4.3, cmake)	12m 46s
r-package (clang18, R-devel)	17m 26s
r-package (macos-13, gcc, R 4.3, cmake)	11m 26s
r-sanitizers (ubuntu-latest, R-devel, gcc ASAN/UBSAN)	19m 51s
r-package (clang19, R-devel)	10m 56s
r-package (macos-13, clang, R 4.3, cmake)	10m 11s
r-sanitizers (ubuntu-latest, R-devel, clang ASAN/UBSAN)	40m 56s
r-package (gcc14, R-devel)	16m 12s
r-package (windows-latest, MINGW, R 3.6, cmake)	10m 26s
r-package (intel, R-devel)	16m 0s
r-package (windows-latest, MINGW, R 4.3, cmake)	16m 53s
r-package (rchk, R-devel)	17m 36s
r-package (windows-2019, MSVC, R 3.6, cmake)	23m 34s
r-package (windows-2022, MSVC, R 4.3, cmake)	29m 44s
r-package (windows-latest, MINGW, R 3.6, cran)	13m 43s
r-package (windows-latest, MINGW, R 4.3, cran)	14m 30s
r-package (ubuntu-latest, gcc, R 4.3, cran)	13m 52s
r-package (macos-13, clang, R 4.3, cran)	10m 23s
r-package (macos-14, clang, R 4.3, cran)	6m 48s
all-r-package-jobs-successful	1s
	6h 0m 13s

Provide feedback