feat: add AI integration with Ollama and ask command

[d-claro]

What was done

• Added AI integration using Ollama with Llama 3.2 model running locally
• Created new ask command that reads the entire Knowledge Base before answering
• Updated README with full AI setup instructions and usage examples

New command

• ask — asks a question to the AI agent based on the project Knowledge Base

Examples

• python agent/cli.py ask "What should I test next?"
• python agent/cli.py ask "What test cases do we have for the Login module?"

Notes

• Ollama must be installed and running (ollama serve) for this command to work
• Model used: Llama 3.2 (runs locally, no data leaves the machine)
• Open for suggestions and feedback from the team.