feat:(core): add `content encoding` to `Opwrite` #2118

Job	Run time
build_all_platforms (ubuntu-latest)	2m 35s
build_all_features	4m 59s
build_default_features (ubuntu-latest)	58s
build_all_platforms (macos-latest)	3m 26s
build_under_wasm	55s
build_default_features (macos-latest)	1m 9s
build_all_platforms (windows-latest)	6m 14s
build_default_features (windows-latest)	1m 21s
check_clippy	4m 7s
check_docs	3m 52s
check_msrv	37s
unit	6m 43s
	36m 56s

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