feat(core/types): add new buffer util fns #809

Job	Run time
build_all_features	4m 26s
build_all_platforms (ubuntu-latest)	2m 18s
build_all_platforms (macos-latest)	1m 50s
build_default_features (ubuntu-latest)	42s
build_under_wasm	1m 13s
build_all_platforms (windows-latest)	4m 23s
build_default_features (macos-latest)	43s
check_clippy	3m 6s
build_default_features (windows-latest)	1m 32s
check_docs	2m 51s
check_msrv	32s
unit	5m 46s
	29m 22s

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