feat: accelerate add_mod and mul_mod on risc0 zkVM (256-bit, 384-bit)

Dispatch to `risc0-bigint2` field syscalls for `Uint<256, 4>` and
`Uint<384, 6>` operands. `const {}` guards ensure non-matching sizes
strip cleanly at any opt level.

v1.17.2 - fix docs

v1.17.1 - safety and CoUs

v1.17.0 - edition 2024 and more!

v1.16.0 -- performance improvements and rkyv support

v0.13.1

fix: remove unused dep

v1.13.0

- Support for borsh @ 1.5 ([alloy-rs#416])
- `copy_le_to_slice` family to allow easier writing to pre-allocated buffers ([alloy-rs#424])
- Unpin proptest ([alloy-rs#426])
- Update documentation related to `Uint::byte` and knuth divison ([alloy-rs#429])
- add `Uint::checked_byte(idx: usize) -> Option<u8>` ([alloy-rs#429])
- fix: swap bytes for `as_le_bytes` in big endian world ([alloy-rs#431])