feat: add NetBox MCP server for infrastructure management

Comprehensive MCP server covering the entire NetBox REST API:
- DCIM: sites, racks, devices, interfaces, cables, power
- IPAM: prefixes, IP addresses, VLANs, VRFs, ASNs
- Circuits: providers, circuits, terminations
- Virtualization: clusters, VMs, VM interfaces
- Tenancy: tenants, contacts, contact assignments
- VPN: tunnels, IKE/IPSec policies, L2VPN
- Wireless: WLANs, links, groups
- Extras: tags, custom fields, webhooks, audit log

Features:
- 100+ MCP tools for full CRUD operations
- Auto-pagination handling
- Hybrid config (system + project level)
- Available prefix/IP allocation support

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

mcp-servers/netbox/requirements.txt

@@ -0,0 +1,6 @@
+mcp>=0.9.0               # MCP SDK from Anthropic
+python-dotenv>=1.0.0     # Environment variable loading
+requests>=2.31.0         # HTTP client for NetBox API
+pydantic>=2.5.0          # Data validation
+pytest>=7.4.3            # Testing framework
+pytest-asyncio>=0.23.0   # Async testing support