ci: add PR CI

Author: arad-starkware

.github/workflows/on-pull-request.yaml

@@ -0,0 +1,36 @@
+name: Pull Request Integration
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: foundry-rs/setup-snfoundry@v3
+        with:
+          starknet-foundry-version: "0.49.0"
+      - uses: software-mansion/setup-scarb@v1
+        with:
+          scarb-version: "2.12.2"
+
+      - name: Install cairo-coverage
+        run: |
+          curl -L https://raw.githubusercontent.com/software-mansion/cairo-coverage/main/scripts/install.sh | sh
+
+      - name: Run test and coverage
+        run: scarb test -w --coverage
+
+      - uses: codecov/codecov-action@v5.3.1
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: packages/utils/coverage/coverage.lcov
+          fail_ci_if_error: true
+
+      - name: Check formatting
+        run: |
+          scarb fmt -w --check