fix: ai-powered-hackathon-idea-generator-service (closes #5)

[AYo101o]

1. Dependency Installation
   Installed the openai SDK to interact with OpenAI's Chat Completion API.

2. Generator Service
   Created generator.service.ts
   .
   Implemented
   GeneratorService
   which uses the gpt-4o-mini model with JSON response format to ensure structured output.
   The service generates a ProjectIdea object containing a title, description, key features, recommended tech, and difficulty.

3. API Routes
   Created generator.routes.ts
   .
   Exposed a POST /api/generator/generate endpoint.
   Registered the route in the main index.ts
   .

4. Testing & Verification
   Created generator.test.ts
   .
   Implemented integration tests with mocked OpenAI responses using Jest's ESM-compatible mocking (unstable_mockModule).
   Resolved various ESM/TypeScript configuration issues in the test runner to ensure a stable testing environment.
   Validation Results
   Automated Tests
   The test suite passed successfully:

PASS tests/generator.test.ts Generator API Integration Tests POST /api/generator/generate √ should generate a project idea with valid input (136 ms) √ should return 400 if required fields are missing (13 ms) Test Suites: 1 passed, 1 total Tests: 2 passed, 2 total

How to Test Manually
You can test the endpoint using curl:

bash curl -X POST http://localhost:8080/api/generator/generate \ -H "Content-Type: application/json" \ -d '{ "theme": "Decentralized Finance", "techStack": ["React", "Solidity", "Ethers.js"], "difficulty": "Intermediate" }'

closes #5

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[ayomideadeniran]

Pr under review or i will give feedback or simply merge Pr.