Implemetation Dynamic Clustering

[leeeunkoo]

added feature clustering## 📝 PR Description

• Implements the PICCOLO clustering system as described in the LLD document.
• Adds master/sub (NodeAgent) architecture: node registration, management, state synchronization, and failure recovery logic.
• Integrates gRPC-based node registration and state communication, ETCD state storage, heartbeat/recovery/policy synchronization processes.
• Supports Podman-based daemonless container management and resource/system check and deployment scripts optimized for embedded environments.
• Implements security features (TLS authentication, role-based access control) and logic to support multiple cluster topologies.

🔗 Related Issue

Closes #

🧪 Test Method

• Unit tests: node registration/deletion, state changes, heartbeat/recovery logic
• Integration tests: full clustering scenarios (master-sub node), failure and auto-recovery flows
• Deployment script (shell) execution tests for both embedded and cloud environments
• Simulated gRPC/ETCD communication and consistency checks on state data

📸 Screenshots

✅ Checklist

• Master/sub node registration and state management
• gRPC-based communication and event handling
• ETCD integration for state storage/retrieval
• Heartbeat and failure detection/recovery
• Policy/configuration synchronization and distribution
• Podman-based container management
• Shell-based deployment/system check scripts
• TLS and RBAC security handling
• Unit/integration test coverage and verification