Rework public interface #54

Job	Run time
Miri	45s
Miri	45s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-gnu)	19s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-gnu)	29s
Clippy	13s
Clippy	13s
QEMU build & test (stable, ubuntu-latest, s390x-unknown-linux-gnu, s390x-linux-gnu-gcc, qemu-s390...	23s
QEMU build & test (stable, ubuntu-latest, s390x-unknown-linux-gnu, s390x-linux-gnu-gcc, qemu-s390...	23s
Build and test (msrv, ubuntu-latest, x86_64-unknown-linux-gnu)	24s
Build and test (msrv, ubuntu-latest, x86_64-unknown-linux-gnu)	24s
Clippy (--no-default-features --features="c-allocator")	23s
Clippy (--no-default-features --features="c-allocator")	23s
Build and test (beta, ubuntu-latest, x86_64-unknown-linux-gnu)	25s
Build and test (beta, ubuntu-latest, x86_64-unknown-linux-gnu)	25s
QEMU build & test (stable, ubuntu-latest, i686-unknown-linux-gnu, i686-linux-gnu-gcc)	43s
QEMU build & test (stable, ubuntu-latest, i686-unknown-linux-gnu, i686-linux-gnu-gcc)	43s
Clippy (--no-default-features --features="rust-allocator")	21s
Clippy (--no-default-features --features="rust-allocator")	21s
wasm32	32s
wasm32	32s
	9m 6s

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