OPFS support for OpenDAL (draft PR) #2002

Job	Run time
build_all_features	4m 44s
build_all_platforms (ubuntu-latest)	2m 43s
build_all_platforms (macos-latest)	2m 32s
build_default_features (ubuntu-latest)	39s
build_all_platforms (windows-latest)	2m 43s
build_default_features (macos-latest)	41s
build_default_features (windows-latest)	48s
build_under_wasm	44s
check_clippy	3m 53s
check_docs	3m 31s
check_msrv	47s
unit	4m 55s
	28m 40s

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