feat: add GPU monitoring support via Glances integration (#5255)

* feat: add GPU monitoring support via Glances integration

- Add GPU fields to SystemHealthMonitoring interface (gpuId, name,
  memoryUtilization, processorUtilization, temperature, fanSpeed)
- Extend Glances integration to parse GPU data from /api/4/all endpoint
  (supports NVIDIA, AMD, and Intel GPUs via Glances)
- Add GPU utilization ring to Health Monitoring widget with tooltip
  showing VRAM usage, temperature, and fan speed
- Add GPU time-series chart to System Resources widget (grape color)
- Add GPU toggle option to both widgets
- Add English translations for GPU labels
- Add gpu: [] to all other integrations (dashdot, truenas, unraid,
  openmediavault) for backward compatibility
- Add GPU mock data for development/testing

Closes community request from PR #5102 for GPU monitoring support.

* fix: implement GPU monitoring for dashdot integration and clarify OMV comment

- Add GPU load fetching via dashdot /load/gpu endpoint
- Add GPU info parsing from dashdot /info endpoint
- Add gpuLoadApi and gpu field to internalServerInfoApi schemas
- Add getCurrentGpuLoadAsync method to DashDotIntegration
- Map GPU load data to SystemHealthMonitoring gpu array
- Add explanatory comment for OMV's empty gpu array

Addresses review comments from manuel-rw on PR #5255

* Delete manifest.json

packages/integrations/src/interfaces/health-monitoring/health-monitoring-types.ts

@@ -31,6 +31,14 @@ export interface SystemHealthMonitoring {
     overallStatus: string;
     healthy: boolean;
   }[];
+  gpu: {
+    gpuId: string;
+    name: string;
+    memoryUtilization: number;
+    processorUtilization: number;
+    temperature: number | null;
+    fanSpeed: number | null;
+  }[];
 }
 
 // TODO: in the future decouple this from the Proxmox integration