Impl `ParamCurve`, `ParamCurveArclen` for `Arc` #620

Job	Run time
cargo check (msrv) (wasm32)	19s
cargo clippy (wasm32)	38s
cargo clippy (windows-latest)	1m 24s
cargo check (msrv) (windows-latest)	59s
cargo clippy (macos-latest)	41s
cargo doc	26s
cargo clippy (ubuntu-latest)	45s
cargo check (msrv) (macos-latest)	27s
cargo fmt	25s
cargo check (msrv) (ubuntu-latest)	23s
cargo test (windows-latest)	40s
cargo test (wasm32)	16s
cargo test (macos-latest)	22s
typos	4s
cargo test (ubuntu-latest)	22s
	8m 11s

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