Fix Jest configuration for ES modules

- Rename jest.config.js to jest.config.cjs for ES module compatibility
- Update package.json test scripts to explicitly reference jest.config.cjs
- All tests now pass successfully (5/5 tests passing)
- Resolves ES module scope issues with Jest configuration

Co-authored-by: openhands <openhands@all-hands.dev>

Author: openhands-agent

jest.config.js renamed to jest.config.cjs

@@ -12,9 +12,9 @@
     "lint:fix": "eslint src/**/*.ts --fix",
     "format": "prettier --write \"src/**/*.ts\" \"examples/**/*.ts\"",
     "format:check": "prettier --check \"src/**/*.ts\" \"examples/**/*.ts\"",
-    "test": "jest",
-    "test:watch": "jest --watch",
-    "test:coverage": "jest --coverage",
+    "test": "jest --config jest.config.cjs",
+    "test:watch": "jest --config jest.config.cjs --watch",
+    "test:coverage": "jest --config jest.config.cjs --coverage",
     "dev": "tsc --watch",
     "clean": "rm -rf dist",
     "prepublishOnly": "npm run clean && npm run build && npm test"