Implement Soroban Developer Integration Wizard

# 🧠 Concept
Guide developers through BridgeWise integration setup.

## ⚠️ Problem
Initial integration requires manual configuration.

## 📁 Implementation Scope
- `apps/docs/integration-wizard/`

## ✅ Requirements
- Generate setup flows
- Validate configuration
- Provide integration guidance

## 🎯 Acceptance Criteria
- [ ] Integration wizard implemented
- [ ] Setup validation functional