Add RISCV Support

Hi,

Can you add support for riscv64 ?

Have see this issue from lance-core dependancy
```
> error[E0308]: mismatched types
> --> /build/semcode-0.1.1-vendor/source-registry-0/lance-core-3.0.1/src/utils/cpu.rs:20:67
> |
> 20 | pub static SIMD_SUPPORT: LazyLock = LazyLock::new(|| {
> | ___________________________________________________________________^
> 21 | | #[cfg(all(target_arch = "aarch64", any(target_os = "ios", target_os = "tvos")))]
> ... |
> 61 | | });
> | |_^ expected `SimdSupport`, found `()`
```

Best Regards