Draft: add command to pretty-print circuits

[clarus]

Here, we add code to pretty-print the constraints of the circuits and compare them with the ones we obtain in our formal models in Rocq. We worked on the branch_eq and sha256 modules. For sha256, we do not cover the constraints in Encoder and the bus constraints yet, but they should work also given more time (we can pretty-print them, but the corresponding code in Rocq is not ready yet).

The commands to run the project from the root folder and pretty-print the constraints on the standard output:

cargo run --package openvm-to-rocq -- print --circuit-type branch-eq
cargo run --package openvm-to-rocq -- print --circuit-type sha256