Improve AI analysis with prompt engineering

Enhance AI-powered troubleshooting with better context and structured prompts:

Features to implement

• Create specialized prompts for different types of issues (pod crashes, network failures, etc.)
• Add more context including cluster state, resource relationships, and historical data
• Improve parsing of AI responses for structured output
• Add support for alternative LLM providers beyond Ollama

Implementation details

• Enhance lib/ai/ollama.sh module
• Add context collection utilities
• Create specific prompt templates for different issues
• Add structured response parsing