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/regions.py

@@ -0,0 +1,53 @@
+"""
+Regions Resource
+
+Available region listings
+"""
+
+from typing import Dict, List
+from .base import BaseResource
+
+
+class RegionsResource(BaseResource):
+    """
+    Region listings
+
+    Usage:
+        # List all regions
+        regions = client.regions.list()
+
+        # List plans available in a region
+        plans = client.regions.list_availability("ewr")
+    """
+
+    def list(self, per_page: int = 100, cursor: str = None) -> Dict:
+        """
+        List all regions
+
+        Returns:
+            Dict with 'regions' list and 'meta' pagination
+        """
+        params = {"per_page": per_page}
+        if cursor:
+            params["cursor"] = cursor
+        return self.client.get("regions", params=params)
+
+    def list_all(self) -> List[Dict]:
+        """List all regions (auto-paginate)"""
+        return self.client.paginate("regions", "regions")
+
+    def list_availability(self, region_id: str, plan_type: str = None) -> Dict:
+        """
+        List available plans in a region
+
+        Args:
+            region_id: Region ID (e.g., "ewr", "lax", "nrt")
+            plan_type: Filter by type ("vc2", "vhf", "vdc")
+
+        Returns:
+            Dict with 'available_plans' list
+        """
+        params = {}
+        if plan_type:
+            params["type"] = plan_type
+        return self.client.get(f"regions/{region_id}/availability", params=params)