`Line::from` for `(Point, Point)`, `(Point, Vec2)` #611

Job	Run time
cargo clippy (wasm32)	40s
cargo check (msrv) (wasm32)	26s
cargo clippy (windows-latest)	1m 16s
cargo check (msrv) (windows-latest)	1m 11s
cargo clippy (macos-latest)	38s
cargo doc	29s
cargo check (msrv) (macos-latest)	33s
cargo fmt	22s
cargo clippy (ubuntu-latest)	49s
cargo check (msrv) (ubuntu-latest)	26s
cargo test (windows-latest)	1m 13s
cargo test (wasm32)	17s
typos	4s
cargo test (macos-latest)	22s
cargo test (ubuntu-latest)	24s
	9m 10s

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