Commitment and Commitment State for Linear Code PCS are private

[beekayg15]

Summary of Bug

The data structures of poly-commit/src/linear_codes have restricted visibility. Specifically, the LinCodePCCommitment and LinCodePCCommitmentState data structures required to store the commitments are currently private.

Version

0.5.0

Steps to Reproduce

https://github.com/arkworks-rs/poly-commit/blob/a05ec99d0d3e46c8ba0d6d3592980777bc2847e8/poly-commit/src/linear_codes/mod.rs#L37C9-L37C24

We could just change it to

pub use data_structures::*;

if not to

pub use data_structures::{
    BrakedownPCParams, LigeroPCParams, 
    LinCodePCProof, LinCodePCCommitment,
    LinCodePCCommitmentState
};

[klize]

here suffers from the same thing.
those need to be public