Refactor: Improve Project Structure and Code Organization

[FloSch62]

[WIP] Refactor: Improve Project Structure and Code Organization

Problem

The current codebase, while functional, has several architectural challenges:

1. Business logic is tightly coupled with CLI implementation
2. Node type handling is not easily extensible
3. Error handling is inconsistent across the codebase
4. Dependencies are directly instantiated rather than injected
5. Command implementation logic is mixed with CLI argument parsing

Solution

This PR introduces a cleaner architecture that:

1. Separates concerns into distinct layers
2. Introduces proper dependency injection
3. Improves error handling and logging

Key Changes

1. Project Structure Reorganization

clab_connector/
├── cli/                  # CLI interface layer
├── models/              # Domain models
├── services/            # Business logic
├── clients/             # External system clients
└── utils/               # Shared utilities

[hellt]

@FloSch62 are these used anywhere?

[FloSch62]

no they can go, will remove it