Read rpm from VESC motor controller #155

Job	Run time
build-without-terminfo (gcc12)	4m 45s
build-without-terminfo (clang16)	5m 15s
build (--config=clang-format)	4m 47s
build (--config=clang-tidy)	5m 14s
build (--compilation_mode=opt)	4m 35s
buildifier	14s
test (gcc12)	4m 39s
test (gcc12, asan)	4m 36s
test (gcc12, tsan)	4m 11s
test (gcc12, ubsan)	4m 54s
test (clang16)	5m 14s
test (clang16, asan)	4m 35s
test (clang16, tsan)	4m 21s
test (clang16, ubsan)	4m 23s
	1h 1m 43s

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