Circom wrapper's helper function (#26)

* r1cs_parser

* z vector calculation

* test function done

* improved

* Brushuped

* add comment

* Added description of test_circuit

* found mistake

* fixed cargo.toml

* Imported ark-circom as crate

* improved l in R1CS as the number of public I/O

* separate test functions into success/failure and unify variable to pub_io_len

* removed bn254 & abstracted to PrimeField, but still some work

* add comments and clean up code

* move ark-bn254 in dev-dependencies

* abstracted test function

* fixed github action's error

* cargo fmt

* remove convert_constraints_bigint_to_scalar function

* fixed n_cols

* fixed n_cols

* Add functionality to compile Circom files in tests

* Remove test_circuit.r1cs

* Introduce CircomFrontend trait and simplify with CircomWrapper struct

* deleted the CircomFrontend

* improved

* fixed clippy lint checks of github actions

* probably fixed github actions error by changing the github yaml

* fixed github yaml, fmt, and clippy

---------

Co-authored-by: Carlos Pérez <37264926+CPerezz@users.noreply.github.com>

.github/workflows/ci.yml

@@ -49,6 +49,14 @@ jobs:
       # use the more efficient nextest
       - uses: taiki-e/install-action@nextest
       - uses: Swatinem/rust-cache@v2
+      - name: Download Circom
+        run: |
+          mkdir -p $HOME/bin
+          curl -sSfL https://github.com/iden3/circom/releases/download/v2.1.6/circom-linux-amd64 -o $HOME/bin/circom
+          chmod +x $HOME/bin/circom
+          echo "$HOME/bin" >> $GITHUB_PATH
+      - name: Execute compile.sh to generate .r1cs and .wasm from .circom
+        run: bash ./src/frontend/circom/test_folder/compile.sh
       - name: Build
         # This build will be reused by nextest,
         # and also checks (--all-targets) that benches don't bit-rot