Add the `Rect::overlaps` and `Rect::contains_rect` methods #542

Job	Run time
cargo clippy (wasm32)	44s
cargo check (msrv) (wasm32)	28s
cargo clippy (windows-latest)	1m 19s
cargo check (msrv) (windows-latest)	1m 9s
cargo clippy (macos-latest)	43s
cargo check (msrv) (macos-latest)	34s
cargo doc	15s
cargo clippy (ubuntu-latest)	40s
cargo fmt	25s
cargo check (msrv) (ubuntu-latest)	27s
cargo test (windows-latest)	40s
cargo test (wasm32)	16s
cargo test (macos-latest)	23s
typos	7s
cargo test (ubuntu-latest)	20s
	8m 30s

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