Update remappings.txt for upgradeable contracts and set up submodule (#4639)

Co-authored-by: Hadrien Croubois <hadrien.croubois@gmail.com>
Co-authored-by: Ernesto García <ernestognw@gmail.com>

.github/workflows/checks.yml

@@ -57,8 +57,9 @@ jobs:
       - name: Set up environment
         uses: ./.github/actions/setup
       - name: Copy non-upgradeable contracts as dependency
-        run:
-          cp -rnT contracts node_modules/@openzeppelin/contracts
+        run: |
+          mkdir -p lib/openzeppelin-contracts
+          cp -rnT contracts lib/openzeppelin-contracts/contracts
       - name: Transpile to upgradeable
         run: bash scripts/upgradeable/transpile.sh
       - name: Run tests
@@ -78,10 +79,8 @@ jobs:
       - uses: actions/checkout@v4
         with:
           submodules: recursive
-      - name: Install Foundry
-        uses: foundry-rs/foundry-toolchain@v1
-        with:
-          version: nightly
+      - name: Set up environment
+        uses: ./.github/actions/setup
       - name: Run tests
         run: forge test -vv
 

.github/workflows/upgradeable.yml

@@ -29,4 +29,6 @@ jobs:
       - run: bash scripts/git-user-config.sh
       - name: Transpile to upgradeable
         run: bash scripts/upgradeable/transpile-onto.sh ${{ github.ref_name }} origin/${{ github.ref_name }}
+        env:
+          SUBMODULE_REMOTE: https://github.com/${{ github.repository }}.git
       - run: git push origin ${{ github.ref_name }}