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/task.go

@@ -0,0 +1,97 @@
+package transfer
+
+import (
+	"context"
+	"fmt"
+	"sync"
+	"sync/atomic"
+
+	"github.com/krau/SaveAny-Bot/core"
+	"github.com/krau/SaveAny-Bot/pkg/enums/tasktype"
+	"github.com/krau/SaveAny-Bot/pkg/storagetypes"
+	"github.com/krau/SaveAny-Bot/storage"
+	"github.com/rs/xid"
+)
+
+var _ core.Executable = (*Task)(nil)
+
+type TaskElement struct {
+	ID            string
+	SourceStorage storage.Storage
+	SourcePath    string
+	FileInfo      storagetypes.FileInfo
+	TargetStorage storage.Storage
+	TargetPath    string
+}
+
+type Task struct {
+	ID           string
+	ctx          context.Context
+	elems        []TaskElement
+	Progress     ProgressTracker
+	IgnoreErrors bool
+	uploaded     atomic.Int64
+	totalSize    int64
+	processing   map[string]TaskElementInfo
+	processingMu sync.RWMutex
+	failed       map[string]error
+}
+
+// Title implements core.Executable.
+func (t *Task) Title() string {
+	return fmt.Sprintf("[%s](%d files/%.2fMB)", t.Type(), len(t.elems), float64(t.totalSize)/(1024*1024))
+}
+
+// Type implements core.Executable.
+func (t *Task) Type() tasktype.TaskType {
+	return tasktype.TaskTypeTransfer
+}
+
+// TaskID implements core.Executable.
+func (t *Task) TaskID() string {
+	return t.ID
+}
+
+func NewTaskElement(
+	sourceStorage storage.Storage,
+	fileInfo storagetypes.FileInfo,
+	targetStorage storage.Storage,
+	targetPath string,
+) *TaskElement {
+	id := xid.New().String()
+	return &TaskElement{
+		ID:            id,
+		SourceStorage: sourceStorage,
+		SourcePath:    fileInfo.Path,
+		FileInfo:      fileInfo,
+		TargetStorage: targetStorage,
+		TargetPath:    targetPath,
+	}
+}
+
+func NewTransferTask(
+	id string,
+	ctx context.Context,
+	elems []TaskElement,
+	progress ProgressTracker,
+	ignoreErrors bool,
+) *Task {
+	task := &Task{
+		ID:       id,
+		ctx:      ctx,
+		elems:    elems,
+		Progress: progress,
+		uploaded: atomic.Int64{},
+		totalSize: func() int64 {
+			var total int64
+			for _, elem := range elems {
+				total += elem.FileInfo.Size
+			}
+			return total
+		}(),
+		processing:   make(map[string]TaskElementInfo),
+		IgnoreErrors: ignoreErrors,
+		failed:       make(map[string]error),
+	}
+	return task
+}