Support for uint256/int256

[elyase]

Is your feature request related to a problem?

Description
The most commonly used data types for smart contracts and token math on the blockchain are uint256 and int256. Currently, people in the crypto community are resorting to inefficient methods like converting to float or string because there is no native support for these data types. For example, paradigmxyz/cryo exports duplicate data columns in various formats (float, binary, string) due to the absence of native support in polars

Describe the solution you'd like

Native first class support for int256

Describe alternatives you've considered

convert to float64

Additional Context

Polars issue:
pola-rs/polars#15443

https://github.com/recmo/uint

Would you like to implement a fix?

No

[jaychia]

Seems similar to #2889, wonder if we could knock out two birds with one stone... @colin-ho

[colin-ho]

Similar, probably not in one stone though. We would need to implement all the casting / ffi / kernels, which is a lot of work.

This is not a priority for us at the moment, assigning this as backlog. Open to PR contributions though.