S.M.A.R.T support (#614)

* add agent smart support

* refactor(system): update JSON tags in SmartData struct

* refactor(agent): use serial number as the key of SmartDataMap

Updated the SmartManager's methods to use the device's serial number as the key in the SmartDataMap instead of the device name.

* refactor: use raw values in smart attributes for nvme devices

* feat: add S.M.A.R.T. data display in web ui

Introduced a new Disks tab in the SystemDetail component to display disk information and S.M.A.R.T. data. The tab includes a table for visualizing disk attributes and their statuses.

Also added SmartData and SmartAttribute interfaces to support the new functionality.

beszel/internal/agent/system.go

@@ -237,6 +237,17 @@ func (a *Agent) getSystemStats() system.Stats {
 			}
 		}
 	}
+	if a.smartManager != nil {
+		if smartData := a.smartManager.GetCurrentData(); len(smartData) > 0 {
+			systemStats.SmartData = smartData
+			if systemStats.Temperatures == nil {
+				systemStats.Temperatures = make(map[string]float64, len(a.smartManager.SmartDataMap))
+			}
+			for key, value := range a.smartManager.SmartDataMap {
+				systemStats.Temperatures[key] = float64(value.Temperature)
+			}
+		}
+	}
 
 	// update base system info
 	a.systemInfo.Cpu = systemStats.Cpu