Add support for Windows #196

Job	Run time
Clippy	11s
Build and test (stable, ubuntu-latest, x86_64-unknown-linux-gnu)	51s
Miri	1m 9s
Build and test (msrv, ubuntu-latest, x86_64-unknown-linux-gnu)	41s
Clippy (--no-default-features --features="c-allocator")	9s
QEMU build & test (stable, ubuntu-latest, s390x-unknown-linux-gnu, s390x-linux-gnu-gcc, qemu-s390...	42s
Build and test (beta, ubuntu-latest, x86_64-unknown-linux-gnu)	46s
Clippy (--no-default-features --features="rust-allocator")	19s
QEMU build & test (stable, ubuntu-latest, i686-unknown-linux-gnu, i686-linux-gnu-gcc)	47s
Build and test (stable, macos-latest, x86_64-apple-darwin)	46s
Build and test (stable, macos-14, aarch64-apple-darwin)	38s
wasm32	29s
Build and test (stable-x86_64-gnu, windows-2022, x86_64-pc-windows-gnu)	37s
	8m 5s

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