feat!: Refactor batch import task to transfer task

- Updated command usage in English and Simplified Chinese localization files to reflect changes in transfer command syntax.
- Removed batch import task implementation, replacing it with a new transfer task implementation.
- Introduced new task structure and progress tracking for file transfers.
- Updated task type enumeration to replace batch import with transfer.
- Added new fields in data structures to support transfer operations.
- Implemented file handling and progress reporting for the transfer task.

core/tasks/transfer/execute.go

@@ -1,4 +1,4 @@
-package batchimport
+package transfer
 
 import (
 	"context"

core/tasks/transfer/progress.go

@@ -1,4 +1,4 @@
-package batchimport
+package transfer
 
 import (
 	"context"

core/tasks/transfer/task.go

@@ -1,4 +1,4 @@
-package batchimport
+package transfer
 
 import (
 	"context"
@@ -44,7 +44,7 @@ func (t *Task) Title() string {
 
 // Type implements core.Executable.
 func (t *Task) Type() tasktype.TaskType {
-	return tasktype.TaskTypeBatchimport
+	return tasktype.TaskTypeTransfer
 }
 
 // TaskID implements core.Executable.
@@ -69,7 +69,7 @@ func NewTaskElement(
 	}
 }
 
-func NewBatchImportTask(
+func NewTransferTask(
 	id string,
 	ctx context.Context,
 	elems []TaskElement,

core/tasks/transfer/taskinfo.go

@@ -1,4 +1,4 @@
-package batchimport
+package transfer
 
 type TaskElementInfo interface {
 	FileName() string