Use Poseidon Implementation from plonk-prototype

[tsunrise]

Use Poseidon Implementation from plonk-prototype. Compare to current Poseidon implementation, this PR will add parameter generation and filecoin optimization.

🚧 WIP

closes: #22

[tsunrise]

Something worth discussing at this point:

• Are we going to calculate round constants at compile time or runtime? It might be tricky to calculate round constants in compile time, but we can always hardcode them.
• If we hardcode those round constants, are we going to put it as an associated constants? We cannot do this if we want the poseidon state to be an array because const_generics is not supported yet.

[bhgomes]

Something worth discussing at this point:

• Are we going to calculate round constants at compile time or runtime? It might be tricky to calculate round constants in compile time, but we can always hardcode them.

• If we hardcode those round constants, are we going to put it as an associated constants? We cannot do this if we want the poseidon state to be an array because const_generics is not supported yet.

We can calculate round constants at runtime, they are part of the "parameter sampling" pipeline. This is only ever run once anyway so it's not important to make it a const-expr. You can put this in the Sample implementation for the Hasher.

[tsunrise]

Changes in this PR is moved to #57