Add some functions for Bytes #1888

Job	Run time
nightly	3m 3s
clippy	2m 20s
docs	2m 57s
msrv	1m 20s
rustfmt	12s
basics	1s
wasm	1m 2s
no_std (ubuntu-latest, minimal)	1m 6s
test_doc	5m 11s
no_std (macos-latest, minimal)	1m 10s
build_feature (alloc)	3m 5s
test_lib	4m 31s
build_feature (cli)	3m 46s
test_miri (rune)	3m 40s
build_feature (cli,doc)	3m 45s
test_rune	2m 59s
test_miri (rune-core)	47s
build_feature (cli,fmt)	3m 53s
test_miri (rune-alloc)	6m 19s
build_feature (doc)	3m 19s
build_feature (workspace)	3m 26s
build_feature (languageserver)	3m 45s
build_feature (byte-code)	3m 6s
build_feature (capture-io)	3m 3s
build_feature (emit)	3m 19s
	1h 11m 5s

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