Continue AI-Powered Chatbot for Quick Access to Jenkins Resources

The Jenkins Resources AI Chatbot can answer "how do I install this plugin?" but it can't tell you why your build broke, whether two plugins conflict, or whether last week's prompt change made answers worse. This project fixes that: an LLM-as-a-Judge evaluation pipeline, GraphRAG for relational plugin queries, a Build Failure Diagnosis Agent, and simplifed plugin setup all built directly on top of the existing chatbot-core architecture.