⭐ feat(maitred): Update maitred - hookup to the API (#198)

## Description
We are attempting to hookup maitred to the API
Maitred duties will be:
- [ ] Hookup to the API
- [ ]  Wait for signal (from the API) to start Steam
- [ ] Stop signal to stop the gaming session, clean up Steam... and
maybe do the backup

## Summary by CodeRabbit

- **New Features**
- Introduced Docker-based deployment configurations for both the main
and relay applications.
- Added new API endpoints enabling real-time machine messaging and
enhanced IoT operations.
- Expanded database schema and actor types to support improved machine
tracking.

- **Improvements**
- Enhanced real-time communication and relay management with streamlined
room handling.
- Upgraded dependencies, logging, and error handling for greater
stability and performance.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: DatCaptainHorse <DatCaptainHorse@users.noreply.github.com>
Co-authored-by: Kristian Ollikainen <14197772+DatCaptainHorse@users.noreply.github.com>

packages/maitred/internal/system/gpu_nvidia.go

@@ -0,0 +1,57 @@
+package system
+
+import (
+	"log/slog"
+	"os/exec"
+	"strconv"
+	"strings"
+)
+
+// monitorNVIDIAGPU monitors an NVIDIA GPU using nvidia-smi
+func monitorNVIDIAGPU(device PCIInfo) GPUUsage {
+	// Query nvidia-smi for GPU metrics
+	cmd := exec.Command("nvidia-smi", "--query-gpu=pci.bus_id,utilization.gpu,memory.total,memory.used,memory.free", "--format=csv,noheader,nounits")
+	output, err := cmd.Output()
+	if err != nil {
+		slog.Warn("failed to run nvidia-smi", "error", err)
+		return GPUUsage{}
+	}
+
+	// Parse output and find matching GPU
+	lines := strings.Split(strings.TrimSpace(string(output)), "\n")
+	for _, line := range lines {
+		fields := strings.Split(line, ", ")
+		if len(fields) != 5 {
+			continue
+		}
+		busID := fields[0] // e.g., "0000:01:00.0"
+		if strings.Contains(busID, device.Slot) || strings.Contains(device.Slot, busID) {
+			usagePercent, _ := strconv.ParseFloat(fields[1], 64)
+			totalMiB, _ := strconv.ParseUint(fields[2], 10, 64)
+			usedMiB, _ := strconv.ParseUint(fields[3], 10, 64)
+			freeMiB, _ := strconv.ParseUint(fields[4], 10, 64)
+
+			// Convert MiB to bytes
+			total := totalMiB * 1024 * 1024
+			used := usedMiB * 1024 * 1024
+			free := freeMiB * 1024 * 1024
+			usedPercent := float64(0)
+			if total > 0 {
+				usedPercent = float64(used) / float64(total) * 100
+			}
+
+			return GPUUsage{
+				Info:         device,
+				UsagePercent: usagePercent,
+				VRAM: VRAMUsage{
+					Total:       total,
+					Used:        used,
+					Free:        free,
+					UsedPercent: usedPercent,
+				},
+			}
+		}
+	}
+	slog.Warn("No NVIDIA GPU found matching PCI slot", "slot", device.Slot)
+	return GPUUsage{}
+}