feat: Add into_bytes_sink for Writer #717

Job	Run time
build_all_features	4m 18s
build_all_platforms (ubuntu-latest)	2m 15s
build_all_platforms (macos-latest)	2m 15s
build_default_features (ubuntu-latest)	35s
build_under_wasm	41s
build_all_platforms (windows-latest)	4m 43s
build_default_features (macos-latest)	34s
build_default_features (windows-latest)	2m 8s
check_clippy	3m 18s
check_docs	2m 36s
check_msrv	31s
unit	5m 41s
	29m 35s

Provide feedback