use cargo rdme for tree arena #2358

Job	Run time
cargo check (aarch64-android)	21s
cargo check (msrv) (windows-latest)	1m 52s
cargo check (msrv) (wasm32)	20s
cargo clippy (windows-latest)	4m 34s
cargo check (msrv) (macos-latest)	47s
cargo clippy (macos-latest)	2m 57s
cargo check (msrv) (ubuntu-latest)	40s
cargo clippy (wasm32)	1m 59s
cargo clippy (ubuntu-latest)	3m 28s
cargo doc	39s
formatting	33s
Prime LFS Cache	5s
cargo test (wasm32)	24s
typos	5s
cargo test (windows-latest)	4m 28s
cargo test (macos-latest)	1m 24s
cargo test (ubuntu-latest)	4m 22s
	28m 58s

Provide feedback