Initial commit: Vultr API v2 Python wrapper with FastAPI server

- vultr_api/: Python library wrapping Vultr API v2
  - 17 resource modules (instances, dns, firewall, vpc, etc.)
  - Pagination support, error handling

- server/: FastAPI REST server
  - All API endpoints exposed via HTTP
  - X-API-Key header authentication
  - Swagger docs at /docs

- Podman quadlet config for systemd deployment

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

vultr_api/resources/os.py

@@ -0,0 +1,34 @@
+"""
+OS Resource
+
+Operating system listings
+"""
+
+from typing import Dict, List
+from .base import BaseResource
+
+
+class OSResource(BaseResource):
+    """
+    Operating system listings
+
+    Usage:
+        # List all OS options
+        os_list = client.os.list()
+    """
+
+    def list(self, per_page: int = 100, cursor: str = None) -> Dict:
+        """
+        List available operating systems
+
+        Returns:
+            Dict with 'os' list and 'meta' pagination
+        """
+        params = {"per_page": per_page}
+        if cursor:
+            params["cursor"] = cursor
+        return self.client.get("os", params=params)
+
+    def list_all(self) -> List[Dict]:
+        """List all operating systems (auto-paginate)"""
+        return self.client.paginate("os", "os")