Add some functions for Bytes (#899) #1889

Job	Run time
clippy	2m 1s
docs	3m 36s
msrv	1m 23s
nightly	5m 0s
rustfmt	7s
basics	1s
no_std (ubuntu-latest, minimal)	1m 17s
test_lib	4m 14s
no_std (macos-latest, minimal)	1m 29s
test_doc	5m 16s
build_feature (alloc)	3m 3s
test_miri (rune)	3m 54s
build_feature (cli)	3m 57s
test_rune	2m 59s
test_miri (rune-core)	57s
build_feature (cli,doc)	3m 48s
test_miri (rune-alloc)	6m 13s
build_feature (cli,fmt)	3m 53s
wasm	1m 15s
build_feature (doc)	3m 29s
build_feature (workspace)	3m 16s
build_feature (languageserver)	3m 46s
build_feature (byte-code)	3m 28s
build_feature (capture-io)	3m 7s
build_feature (emit)	3m 16s
	1h 14m 45s

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