feat(buffer): provide a truncating buffer (#63) #383

Job	Run time
coverage	2m 22s
memcheck	9m 28s
checks	40s
sanitize	10m 4s
size-test	40s
size-test-embedded (ci-size-coverage-embedded)	1m 25s
size-test-embedded (ci-size-coverage-embedded-nano)	2m 20s
unit-tests (gcc, Debug)	6m 26s
unit-tests (gcc, Release)	3m 5s
unit-tests (clang, Debug)	5m 7s
unit-tests (clang, Release)	3m 59s
	45m 36s

Provide feedback