feat: add gas diff to CI workflow

.github/workflows/forge-test.yml

@@ -85,4 +85,22 @@ jobs:
       #   uses: terencetcf/github-actions-lcov-minimum-coverage-checker@v1
       #   with:
       #     coverage-file: lcov.info
-      #     minimum-coverage: 90
+      #     minimum-coverage: 90
+
+  snapshot:
+    needs: coverage
+
+    name: Snapshot
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check gas snapshots
+        run: forge snapshot --diff
+
+      - name: Commit changes
+        if: ${{ github.ref == 'refs/heads/dev' }}
+        uses: stefanzweifel/git-auto-commit-action@v4
+        with:
+          commit_message: '[ci] gas snapshot'
+          branch: ${{ github.head_ref }}
+          file_pattern: gas-snapshots/*