Add package data for GPU rent and update CLI documentation

- Added package data configuration for the 'gpu_rent' package in pyproject.toml.
- Updated README.md to include usage instructions for Windows and Unix launchers.
- Enhanced CLI documentation in cli.md to reflect new commands and their functionalities.
- Revised setup.md to clarify installation steps and environment setup.
- Improved error handling and command descriptions in the CLI implementation.
- Added new functions for model version handling and flavor resolution in the codebase.
- Updated state management to include additional properties for better tracking.

tests/test_launchers.py

@@ -0,0 +1,19 @@
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def test_launcher_files_exist():
+    for name in ("gpu-rent.bat", "gpu-rent.ps1", "gpu-rent.sh"):
+        path = ROOT / name
+        assert path.is_file(), name
+        text = path.read_text(encoding="utf-8")
+        assert ".venv" in text or "gpu-rent.ps1" in text
+        assert "gpu_rent" in text or "gpu-rent.ps1" in text
+
+
+def test_launchers_require_python_311():
+    ps1 = (ROOT / "gpu-rent.ps1").read_text(encoding="utf-8")
+    sh = (ROOT / "gpu-rent.sh").read_text(encoding="utf-8")
+    assert "3, 11" in ps1 or "3.11" in ps1
+    assert "3, 11" in sh