- Updated package.json to include Vitest for testing and added necessary devDependencies.
- Created accounts.test.ts to test the accounts API endpoints for listing and retrieving accounts.
- Implemented setup.ts to reset test data before each test run.
- Developed transactions.test.ts to cover creating, updating, and deleting transactions through the API.
- Added vitest.config.ts for configuring Vitest with appropriate settings and coverage options.
