Add firewall, network, VNC, backup, resource management and UsageUpdate

New features implemented:
- Firewall management: enable/disable, status display, apply rules
- IP address management: add/remove IPv4 and IPv6 with client UI
- VNC console access integration (VirtFusion v6.1.0+)
- Backup plan assignment/removal via API
- Resource modification: in-place memory/CPU/traffic changes
- UsageUpdate cron: automated bandwidth and disk usage sync to WHMCS
- Dry run validation: test server creation config before provisioning
- Admin "Validate Server Config" button for dry run testing

Client area additions:
- Firewall panel with enable/disable/apply controls and status badge
- Network panel with IPv4/IPv6 listing, add, and remove buttons
- VNC Console panel with browser-based access
- All panels load asynchronously with spinner indicators

Comprehensive README rewrite with:
- Table of contents, requirements matrix, step-by-step installation
- Detailed configuration guide for all features
- Theme compatibility documentation (Six, Twenty-One, Lagom)
- Complete API endpoints reference organized by category
- UsageUpdate cron documentation with data format details
- Troubleshooting tables for common issues
- Known issues section covering version requirements
- Security architecture documentation
- File structure reference

https://claude.ai/code/session_01TCsJ4WZCGuEX3zqh1tQ2zx

modules/servers/VirtFusionDirect/templates/css/module.css

@@ -123,6 +123,22 @@
     margin: 10px;
 }
 
+/* Network / IP Management */
+.vf-ip-row {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    padding: 4px 0;
+}
+.vf-ip-address {
+    font-family: monospace;
+    font-size: 0.9rem;
+}
+.vf-ip-remove {
+    font-size: 0.7rem;
+    padding: 0.15rem 0.4rem;
+}
+
 /* Responsive adjustments */
 @media (max-width: 768px) {
     .vf-power-buttons {
@@ -131,4 +147,7 @@
     .vf-btn-power {
         width: 100%;
     }
+    .vf-ip-row {
+        flex-wrap: wrap;
+    }
 }