chore: integrate SDK into contracts tests (#47)

Co-authored-by: Lempire <61431140+lempire123@users.noreply.github.com>

.github/workflows/contracts.yml

@@ -65,8 +65,22 @@ jobs:
           node-version: 20.x
           cache: "yarn"
 
-      - name: Install dependencies
+      - name: Install root dependencies
         run: yarn --frozen-lockfile --network-concurrency 1
+        working-directory: .
+
+      - name: Build SDK
+        run: |
+          yarn build
+          chmod +x ./scripts/copy_circuits.sh
+          bash ./scripts/copy_circuits.sh
+        working-directory: packages/sdk
+
+      - name: Link SDK
+        run: |
+          cd ../sdk && yarn link
+          cd ../contracts && yarn link "@privacy-pool-core/sdk"
+        shell: bash
 
       - name: Precompile
         run: yarn build