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/mock/data/system-health-monitoring.ts

@@ -36,6 +36,16 @@ export class SystemHealthMonitoringMockService implements ISystemHealthMonitorin
           healthy: true,
         },
       ],
+      gpu: [
+        {
+          gpuId: "mock0",
+          name: "Mock GPU RTX 4090",
+          memoryUtilization: Math.floor(Math.random() * 100),
+          processorUtilization: Math.floor(Math.random() * 100),
+          temperature: Math.floor(Math.random() * 90),
+          fanSpeed: Math.floor(Math.random() * 2000),
+        },
+      ],
     });
   }
 }