Implement `i128` to `JsValue` conversions

[Razican]

We can currently convert most of Rust's basic types to JsValue, but since the i128 type was a late addition to Rust, we don't offer that conversion. You can implement it by checking how this is done for i64: https://github.com/boa-dev/boa/blob/e2630faf82a27e958d0ca6c9b1c81554bcc07ff3/boa_engine/src/value/mod.rs#L1003-L1008

[Shreyan11]

Just to be clear, you want to convert all i28 types to JsValue?

[ghost]

I'd like to work on this issue

[jonah-saltzman]

Could I work on this issue? It seems to have not been solved on main or the latest commit.

[lastmjs]

I believe there's an open pull request for this: https://github.com/boa-dev/boa/pull/1971

[Razican]

This will be handled in #2276.