Varaverk: monitor grid overhaul + Containers & VMs card

Monitor layout (8-col grid):
- Row 1: System | Power | CPU | Memory | Network
- Row 2: Scripts | Partner & Fallback (span 3) | Containers & VMs (span 4)
- Row 3: GPU (span 2) | Transcode (span 2) | Streams (span 4)
- Row 4: Parity (cols 1-2) | Pools (cols 3-4) | Array (cols 5-8)

New Containers & VMs card:
- Reads FolderView3 folders from docker.json; expand/collapse per folder
- VMs listed first (virsh); containers show start/stop/webui/edit actions
- 2-column balanced layout; collapses to 1 column below 900px
- Docker WebUI URLs resolved from dockerMan template XMLs

New files: include/vms.php, include/docker_folders.php, api/docker_action.php, api/snapshot.php
Responsive: explicit grid-column placements reset at 1024px breakpoint

Plugin/usr/local/emhttp/plugins/varaverk/api/monitor.php

@@ -1,6 +1,8 @@
 <?php
 header('Content-Type: application/json');
 require_once dirname(__DIR__) . '/include/monitor.php';
+require_once dirname(__DIR__) . '/include/vms.php';
+require_once dirname(__DIR__) . '/include/docker_folders.php';
 
 echo json_encode([
     'system'          => vv_system_info(),
@@ -20,7 +22,9 @@ echo json_encode([
     'parity'      => vv_parity_status(),
     'storage'     => vv_storage_pools(),
     'array_disks' => vv_array_disks(),
-    'scripts'     => vv_scripts_status(),
-    'thresholds'  => vv_disk_thresholds(),
-    'ts'          => time(),
+    'scripts'        => vv_scripts_status(),
+    'thresholds'     => vv_disk_thresholds(),
+    'vms'            => vv_get_vms(),
+    'docker_folders' => vv_get_docker_folders(),
+    'ts'             => time(),
 ]);