Add initial S.M.A.R.T. support

- Implement SmartManager for collecting SMART data from SATA and NVMe drives
- Add smartctl-based data collection with standby mode detection
- Support comprehensive SMART attributes parsing and storage
- Add hub API endpoint for fetching SMART data from agents
- Create SMART table UI with detailed disk information

Co-authored-by: geekifan <i@ifan.dev>

internal/common/common-ws.go

@@ -1,6 +1,7 @@
 package common
 
 import (
+	"github.com/henrygd/beszel/internal/entities/smart"
 	"github.com/henrygd/beszel/internal/entities/system"
 )
 
@@ -15,6 +16,8 @@ const (
 	GetContainerLogs
 	// Request container info from agent
 	GetContainerInfo
+	// Request SMART data from agent
+	GetSmartData
 	// Add new actions here...
 )
 
@@ -27,11 +30,12 @@ type HubRequest[T any] struct {
 
 // AgentResponse defines the structure for responses sent from agent to hub.
 type AgentResponse struct {
-	Id          *uint32              `cbor:"0,keyasint,omitempty"`
-	SystemData  *system.CombinedData `cbor:"1,keyasint,omitempty,omitzero"`
-	Fingerprint *FingerprintResponse `cbor:"2,keyasint,omitempty,omitzero"`
-	Error       string               `cbor:"3,keyasint,omitempty,omitzero"`
-	String      *string              `cbor:"4,keyasint,omitempty,omitzero"`
+	Id          *uint32                    `cbor:"0,keyasint,omitempty"`
+	SystemData  *system.CombinedData       `cbor:"1,keyasint,omitempty,omitzero"`
+	Fingerprint *FingerprintResponse       `cbor:"2,keyasint,omitempty,omitzero"`
+	Error       string                     `cbor:"3,keyasint,omitempty,omitzero"`
+	String      *string                    `cbor:"4,keyasint,omitempty,omitzero"`
+	SmartData   map[string]smart.SmartData `cbor:"5,keyasint,omitempty,omitzero"`
 	// Logs        *LogsPayload         `cbor:"4,keyasint,omitempty,omitzero"`
 	// RawBytes    []byte               `cbor:"4,keyasint,omitempty,omitzero"`
 }