feat(core): add `if_not_exist` in `OpWrite` #2000

Job	Run time
build_all_features	5m 4s
build_all_platforms (ubuntu-latest)	2m 37s
build_all_platforms (macos-latest)	2m 20s
build_default_features (ubuntu-latest)	35s
build_under_wasm	1m 22s
build_default_features (macos-latest)	38s
check_clippy	3m 50s
build_default_features (windows-latest)	1m 45s
build_all_platforms (windows-latest)	5m 44s
check_docs	3m 40s
check_msrv	32s
unit	6m 53s
	35m 0s

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