Make image sampling pad in all directions and remove half-pixel offset #1747

Job	Run time
cargo check (aarch64-android)	36s
cargo check (msrv) (wasm32)	40s
cargo clippy (windows-latest)	2m 21s
cargo check (msrv) (windows-latest)	1m 14s
cargo clippy (macos-latest)	1m 3s
cargo check (msrv) (macos-latest)	58s
cargo clippy (wasm32)	1m 18s
cargo clippy (ubuntu-latest)	1m 25s
cargo doc	26s
cargo check (msrv) (ubuntu-latest)	1m 7s
formatting	33s
Prime LFS Cache	5s
cargo test (wasm32)	28s
typos	6s
cargo test (windows-latest)	2m 26s
cargo test (macos-latest)	1m 14s
cargo test (ubuntu-latest)	2m 48s
	18m 48s

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