feat(services/opfs): OPFS backend for OpenDAL #5591

Job	Run time
build_all_platforms (macos-latest)	2m 45s
build_default_features (macos-latest)	1m 0s
build_all_platforms (ubuntu-latest)	2m 54s
check_docs	3m 43s
check_clippy	4m 2s
build_all_platforms (windows-latest)	5m 19s
build_all_features	5m 28s
check_msrv	49s
build_default_features (ubuntu-latest)	41s
build_under_wasm	1m 4s
unit	8m 26s
build_default_features (windows-latest)	1m 39s
doc-test	6m 42s
	44m 32s

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