feat: consolidate platform-specific backend support #74

Job	Run time
cargo fmt (windows-2022, stable)	40s
cargo build (windows-2022, stable)	1m 11s
cargo clippy (windows-2022, stable)	5m 9s
cargo test (windows-2022, stable)	8m 7s
cargo fmt (windows-2022, nightly)	38s
cargo build (windows-2022, nightly)	1m 30s
cargo clippy (windows-2022, nightly)	1m 8s
cargo test (windows-2022, nightly)	7m 3s
cargo fmt (macos-latest, stable)	6s
cargo build (macos-latest, stable)	25s
cargo clippy (macos-latest, stable)	24s
cargo fmt (macos-latest, nightly)	13s
cargo test (macos-latest, stable)	2m 26s
cargo build (macos-latest, nightly)	25s
cargo clippy (macos-latest, nightly)	1m 16s
cargo fmt (ubuntu-22.04, stable)	4s
cargo test (macos-latest, nightly)	1m 32s
cargo build (ubuntu-22.04, stable)	13s
cargo clippy (ubuntu-22.04, stable)	21s
cargo fmt (ubuntu-22.04, nightly)	11s
cargo test (ubuntu-22.04, stable)	3m 11s
cargo clippy (ubuntu-22.04, nightly)	1m 10s
cargo build (ubuntu-22.04, nightly)	22s
cargo test (ubuntu-22.04, nightly)	1m 32s
Upload Test Event	0s
	39m 17s

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