feat: Add Wild Central web app (Central-only UI)

Extract Central pages from the wild-cloud web app into a standalone
React app for Wild Central. Includes:

- Central overview, DNS, DHCP, Firewall, VPN, Ingress, CrowdSec pages
- Simplified sidebar with Central-only navigation
- Branding updated to "Wild Central"
- All Cloud-specific pages, components, hooks, and API services removed
- TypeScript type-check and production build pass

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web/src/services/api/cloudflare.ts

@@ -0,0 +1,20 @@
+import { apiClient } from './client';
+
+export interface CloudflareZone {
+  id: string;
+  name: string;
+}
+
+export interface CloudflareVerifyResponse {
+  tokenConfigured: boolean;
+  tokenValid: boolean;
+  tokenStatus: string;
+  zones: CloudflareZone[] | null;
+  error?: string;
+}
+
+export const cloudflareApi = {
+  async verify(): Promise<CloudflareVerifyResponse> {
+    return apiClient.get('/api/v1/cloudflare/verify');
+  },
+};