Read rpm from VESC motor controller #144

Job	Run time
buildifier	13s
build (--config=clang-format)	4m 47s
build (--config=clang-tidy)	5m 52s
build (--compilation_mode=opt)	4m 44s
build-without-terminfo (gcc12)	3m 35s
build-without-terminfo (clang16)	4m 45s
test (gcc12)	3m 38s
test (gcc12, asan)	3m 28s
test (gcc12, tsan)	4m 4s
test (gcc12, ubsan)	4m 6s
test (clang16)	4m 5s
test (clang16, asan)	4m 6s
test (clang16, tsan)	3m 55s
test (clang16, ubsan)	4m 10s
	55m 28s

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