Impl `ParamCurve`, `ParamCurveArclen` for `Arc` #622

Job	Run time
cargo clippy (wasm32)	38s
cargo check (msrv) (wasm32)	18s
cargo clippy (windows-latest)	1m 20s
cargo check (msrv) (windows-latest)	1m 7s
cargo clippy (macos-latest)	1m 14s
cargo check (msrv) (macos-latest)	26s
cargo doc	24s
cargo clippy (ubuntu-latest)	48s
cargo fmt	22s
cargo check (msrv) (ubuntu-latest)	23s
cargo test (wasm32)	15s
cargo test (windows-latest)	1m 1s
typos	4s
cargo test (macos-latest)	37s
cargo test (ubuntu-latest)	20s
	9m 17s

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