[FEATURE] E2E tests

[f3l1x98]

User Story

1. As a {developer}
2. I want {to have tests to ensure that my new code does not break any existing code (without my knowledge)}
3. So that {I can publish better code}

User Acceptance Criteria

• [ ] Implement a few End-to-End tests

Examples

https://github.com/jvalue/jayvee/blob/main/apps/interpreter/src/examples-smoke-test.spec.ts

Definitions of Done

• [ ] A PR has been opened and accepted
• [ ] All user acceptance criteria are met
• [ ] All tests are passing