feat: Support NebulaGraph #1853

Job	Run time
build_all_features	4m 53s
build_default_features (ubuntu-latest)	38s
build_all_platforms (ubuntu-latest)	2m 43s
build_default_features (macos-latest)	45s
build_under_wasm	52s
build_all_platforms (macos-latest)	2m 3s
build_default_features (windows-latest)	1m 26s
check_clippy	3m 41s
build_all_platforms (windows-latest)	5m 19s
check_docs	3m 21s
check_msrv	1m 12s
unit	6m 27s
	33m 20s

Provide feedback