feat: Add GHA to run snforge test for contracts (#114)

.github/workflows/snforge-test.yml

@@ -0,0 +1,32 @@
+name: snforge Contract Tests
+
+on:
+  pull_request:
+    branches: ["main"]
+    paths:
+      - "src/**"
+      - "tests/**"
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Scarb
+        uses: software-mansion/setup-scarb@v1
+        with:
+          scarb-version: "2.3.1"
+
+      - name: Install snforge
+        run: curl -L https://raw.githubusercontent.com/foundry-rs/starknet-foundry/master/scripts/install.sh | sh
+
+      - name: Run snforge tests
+        run: snforge test
+
+      - name: Upload test logs on failure
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: test-logs
+          path: target/snforge/*.log