feat(alist_v3): add IntSlice type for JSON unmarshalling (#9247)

- Add `IntSlice` type to handle both single int and array in JSON.
- Modify `MeResp` struct to use `IntSlice` for `Role` field.
- Import `encoding/json` for JSON operations.

drivers/alist_v3/types.go

@@ -1,6 +1,7 @@
 package alist_v3
 
 import (
+	"encoding/json"
 	"time"
 
 	"github.com/alist-org/alist/v3/internal/model"
@@ -76,7 +77,7 @@ type MeResp struct {
 	Username   string   `json:"username"`
 	Password   string   `json:"password"`
 	BasePath   string   `json:"base_path"`
-	Role       []int  `json:"role"`
+	Role       IntSlice `json:"role"`
 	Disabled   bool     `json:"disabled"`
 	Permission int      `json:"permission"`
 	SsoId      string   `json:"sso_id"`
@@ -168,3 +169,17 @@ type DecompressReq struct {
 	PutIntoNewDir bool     `json:"put_into_new_dir"`
 	SrcDir        string   `json:"src_dir"`
 }
+
+type IntSlice []int
+
+func (s *IntSlice) UnmarshalJSON(data []byte) error {
+	if len(data) > 0 && data[0] == '[' {
+		return json.Unmarshal(data, (*[]int)(s))
+	}
+	var single int
+	if err := json.Unmarshal(data, &single); err != nil {
+		return err
+	}
+	*s = []int{single}
+	return nil
+}