feat: add AI test case generation with Ollama

[d-claro]

What was done

• Added AI-powered test case generation using Ollama and Llama 3.2
• Added generate-test command that creates a complete test case from a feature description
• Added Generate Test Case with AI option to the Test Cases submenu
• IDs are generated automatically based on existing test cases

New Command

• generate-test — generates a test case using AI based on a feature description

How it works

• User describes the feature to test in natural language
• Ollama generates a complete test case with title and steps
• User reviews the generated test case before saving
• If confirmed, the test case is saved to test_cases.json with an auto-generated ID
• The generation event is logged in history.json automatically

Notes

• Requires Ollama installed and running (ollama serve)
• Uses Llama 3.2 model running locally — no data leaves the machine
• Open for suggestions and feedback from the team.