feat: initial orchestrator service with FastAPI backend and premium GUI

- FastAPI backend with full Proxmox VE API integration
- ISO builder using proxmox-auto-install-assistant
- Premium dark-mode SPA frontend with glassmorphism design
- VM lifecycle management (create, start, stop, destroy)
- Build pipeline tracking with real-time logs
- Deployment automation for custom auto-installer ISOs
- Production deployment script (setup.sh + systemd)
- Comprehensive README with API documentation

venv/lib/python3.12/site-packages/click/_utils.py

@@ -0,0 +1,36 @@
+from __future__ import annotations
+
+import enum
+import typing as t
+
+
+class Sentinel(enum.Enum):
+    """Enum used to define sentinel values.
+
+    .. seealso::
+
+        `PEP 661 - Sentinel Values <https://peps.python.org/pep-0661/>`_.
+    """
+
+    UNSET = object()
+    FLAG_NEEDS_VALUE = object()
+
+    def __repr__(self) -> str:
+        return f"{self.__class__.__name__}.{self.name}"
+
+
+UNSET: t.Literal[Sentinel.UNSET] = Sentinel.UNSET
+"""Sentinel used to indicate that a value is not set."""
+
+FLAG_NEEDS_VALUE: t.Literal[Sentinel.FLAG_NEEDS_VALUE] = Sentinel.FLAG_NEEDS_VALUE
+"""Sentinel used to indicate an option was passed as a flag without a
+value but is not a flag option.
+
+``Option.consume_value`` uses this to prompt or use the ``flag_value``.
+"""
+
+T_UNSET: t.TypeAlias = t.Literal[Sentinel.UNSET]
+"""Type hint for the :data:`UNSET` sentinel value."""
+
+T_FLAG_NEEDS_VALUE: t.TypeAlias = t.Literal[Sentinel.FLAG_NEEDS_VALUE]
+"""Type hint for the :data:`FLAG_NEEDS_VALUE` sentinel value."""