Implement `ArrayEncoding` for `U832` (#288) #760

Job	Run time
clippy	17s
build (1.65.0, thumbv7em-none-eabi)	6m 42s
cross (aarch64-unknown-linux-gnu, stable)	2m 24s
build (1.65.0, wasm32-unknown-unknown)	3m 50s
build-benchmarks	5m 55s
cross (powerpc-unknown-linux-gnu, stable)	4m 2s
doc	16s
build (stable, thumbv7em-none-eabi)	45s
build (stable, wasm32-unknown-unknown)	51s
dudect	7s
rustfmt	6s
test (i686-unknown-linux-gnu, 1.65.0, sudo apt update && sudo apt install gcc-multilib)	5m 4s
test (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	2m 33s
test (x86_64-unknown-linux-gnu, 1.65.0)	8m 44s
test (x86_64-unknown-linux-gnu, stable)	1m 56s
	43m 32s

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