Detect ABI Encoding Inefficiencies

# 🧠 Concept  
Identify inefficient ABI encoding patterns.

## ⚠️ Problem  
Improper encoding increases gas costs.

## 📁 Implementation Scope  
- `rules/optimization/encoding/`

## ✅ Requirements  
- Detect unnecessary encoding operations  
- Suggest alternatives  

## 🎯 Acceptance Criteria  
- [ ] ABI inefficiencies detected  