Add organized O Blockchain documentation and update sidebar navigation
Merge Testing Guide and Testnet Testing Guide into one Consolidated two testing pages into one comprehensive Testing Guide. REMOVED: - Testnet-Testing-Guide.md (old separate testnet guide) UPDATED: - Testing-Guide.md (now comprehensive, includes testnet content) New comprehensive Testing Guide includes: ✅ Quick start (build, start, create wallet, generate blocks) ✅ Complete testing workflows (7 test scenarios) ✅ Volume validation tests ✅ Exchange rate measurement tests ✅ Currency stability detection tests ✅ Stabilization mining tests ✅ Measurement invitation tests ✅ Blocked region measurement tests ✅ Advanced multi-node setup ✅ Common tasks (monitoring, management) ✅ System status commands ✅ Debugging commands ✅ Troubleshooting (all common issues) ✅ Log file locations and filtering ✅ Testing scenarios (step-by-step) ✅ Useful testing commands ✅ Cleanup and reset procedures ✅ Testing configuration options ✅ Testing checklist (comprehensive) ✅ Performance testing ✅ Pro tips and best practices Updated _Sidebar.md: BEFORE: - [Testing](Testing-Guide) - [Testnet](Testnet-Testing-Guide) AFTER: - [Testing Guide](Testing-Guide) Benefits: - All testing info in one comprehensive page - No sub-navigation needed - Complete reference from basic to advanced - Includes regtest/testnet content together - Easier to find all testing information - Better flow: quick start → workflows → advanced The page now provides complete testing documentation from beginner quick start to advanced multi-node testing.
Add Testing, Contributing, and Security documentation