Impl bytemuck traits for `GenericFamily` #685

Job	Run time
cargo clippy (windows-latest)	2m 21s
cargo check (msrv) (android) (armv7-linux-androideabi)	43s
cargo clippy (macos-latest)	54s
cargo check (msrv) (windows-latest)	1m 6s
cargo check (msrv) (android) (aarch64-linux-android)	51s
cargo clippy (android) (armv7-linux-androideabi)	1m 25s
cargo clippy (ubuntu-latest)	59s
cargo check (msrv) (macos-latest)	33s
cargo check (msrv) (android) (x86_64-linux-android)	26s
cargo clippy (android) (aarch64-linux-android)	1m 46s
cargo check (msrv) (ubuntu-latest)	22s
cargo clippy (android) (x86_64-linux-android)	54s
cargo doc (windows-latest)	1m 12s
formatting	20s
cargo test (windows-latest)	1m 13s
cargo doc (macos-latest)	20s
typos	8s
cargo test (macos-latest)	37s
cargo doc (ubuntu-latest)	20s
cargo test (ubuntu-latest)	31s
	17m 1s

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