Create CursorTest harness #790

Job	Run time
cargo check (msrv) (android) (armv7-linux-androideabi)	25s
cargo clippy (android) (armv7-linux-androideabi)	1m 47s
cargo check (msrv) (android) (aarch64-linux-android)	44s
cargo check (msrv) (windows-latest)	1m 1s
cargo clippy (android) (aarch64-linux-android)	1m 1s
cargo clippy (windows-latest)	1m 40s
cargo check (msrv) (android) (x86_64-linux-android)	51s
cargo check (msrv) (macos-latest)	27s
cargo clippy (android) (x86_64-linux-android)	1m 41s
cargo clippy (macos-latest)	53s
cargo check (msrv) (ubuntu-latest)	23s
cargo clippy (ubuntu-latest)	1m 1s
cargo doc (windows-latest)	2m 13s
formatting	20s
cargo doc (macos-latest)	52s
cargo test (windows-latest)	1m 42s
typos	3s
cargo doc (ubuntu-latest)	1m 19s
cargo test (macos-latest)	31s
cargo test (ubuntu-latest)	31s
	19m 25s

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