Add `DivRemLimb` and `RemLimb` traits #1372

Job	Run time
minimal-versions	26s
build (1.73.0, thumbv7em-none-eabi)	40s
build (1.73.0, wasm32-unknown-unknown)	40s
build-benchmarks	50s
clippy	18s
build (stable, thumbv7em-none-eabi)	37s
build (stable, wasm32-unknown-unknown)	32s
cross (aarch64-unknown-linux-gnu, stable)	3m 3s
doc	30s
cross (powerpc-unknown-linux-gnu, stable)	3m 5s
dudect	22s
rustfmt	14s
test (i686-unknown-linux-gnu, 1.73.0, sudo apt update && sudo apt install gcc-multilib)	2m 11s
test (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	1m 49s
test (x86_64-unknown-linux-gnu, 1.73.0)	1m 43s
test (x86_64-unknown-linux-gnu, stable)	1m 28s
	18m 28s

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