Bump version to 0.2.0 and enhance documentation

- Updated version number in pyproject.toml and __init__.py to 0.2.0.
- Revised README.md to reflect the current state of the project, including usage instructions and setup steps.
- Improved CLI documentation in cli.md, adding details about new commands and their functionalities.
- Enhanced the quick start section in README.md for better clarity on initial setup.
- Updated local folder documentation to clarify file handling and commands.
- Added a new command for listing GPU flavors and improved error handling in the CLI.
- Implemented a watchdog feature in the tunnel to manage server states effectively.

src/gpu_rent/doctor.py

@@ -361,6 +361,7 @@ def dry_run_plan(checks: list[Check]) -> list[str]:
         f"data volume: {cfg.data_volume_size_gb} GB (рост только вверх)",
         f"preemptible: {cfg.default_spot} (обычный сервер: gpu-rent up --no-spot)",
         f"idle-killer: {cfg.idle_minutes} мин пустой очереди, льгота {cfg.idle_grace_minutes} мин",
+        "₽: в API нет — смотри панель; диск 24/7 даже после stop",
         f"туннель: localhost:{cfg.swarmui_local_port} -> VM :7801",
         "gpu-rent up --yes создаст сеть/диски/compute и поставит SwarmUI (если doctor зелёный и квота GPU > 0)",
         "после up: gpu-rent tunnel  (Ctrl+C не гасит GPU)",