Implement Soroban Analysis Knowledge Base

[mijinummi]

🧠 Concept

Create a searchable knowledge base for findings and rules.

⚠️ Problem

Users repeatedly research common findings.

📁 Implementation Scope

• src/knowledge-base/stellar/

✅ Requirements

• Store rule explanations
• Support search functionality
• Link findings to documentation

🎯 Acceptance Criteria

• Knowledge base implemented
• Search functionality operational