feat: add import command and batch import functionality

- Implemented the `/import` command to allow users to import files from storage to Telegram.
- Added support for listing files in storage and filtering based on regex patterns.
- Created a batch import task to handle multiple file uploads concurrently.
- Introduced progress tracking for batch imports, providing real-time updates to users.
- Enhanced storage interfaces to support file listing and reading capabilities.
- Updated localization files for the new import command and its usage instructions.
- Added utility functions for file size formatting and speed calculation.
- Refactored Telegram storage handling to support reading from non-seekable streams.

storage/local/local.go

@@ -12,6 +12,7 @@ import (
 	"github.com/duke-git/lancet/v2/fileutil"
 	config "github.com/krau/SaveAny-Bot/config/storage"
 	storenum "github.com/krau/SaveAny-Bot/pkg/enums/storage"
+	"github.com/krau/SaveAny-Bot/pkg/storagetypes"
 )
 
 type Local struct {
@@ -81,3 +82,51 @@ func (l *Local) Exists(ctx context.Context, storagePath string) bool {
 	}
 	return fileutil.IsExist(absPath)
 }
+
+// ListFiles implements StorageListable interface
+func (l *Local) ListFiles(ctx context.Context, dirPath string) ([]storagetypes.FileInfo, error) {
+	absPath := l.JoinStoragePath(dirPath)
+	
+	entries, err := os.ReadDir(absPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read directory %s: %w", absPath, err)
+	}
+	
+	files := make([]storagetypes.FileInfo, 0, len(entries))
+	for _, entry := range entries {
+		info, err := entry.Info()
+		if err != nil {
+			l.logger.Warnf("Failed to get file info for %s: %v", entry.Name(), err)
+			continue
+		}
+		
+		filePath := filepath.Join(dirPath, entry.Name())
+		files = append(files, storagetypes.FileInfo{
+			Name:    entry.Name(),
+			Path:    filePath,
+			Size:    info.Size(),
+			IsDir:   entry.IsDir(),
+			ModTime: info.ModTime(),
+		})
+	}
+	
+	return files, nil
+}
+
+// OpenFile implements StorageReadable interface
+func (l *Local) OpenFile(ctx context.Context, filePath string) (io.ReadCloser, int64, error) {
+	absPath := l.JoinStoragePath(filePath)
+	
+	file, err := os.Open(absPath)
+	if err != nil {
+		return nil, 0, fmt.Errorf("failed to open file %s: %w", absPath, err)
+	}
+	
+	stat, err := file.Stat()
+	if err != nil {
+		file.Close()
+		return nil, 0, fmt.Errorf("failed to stat file %s: %w", absPath, err)
+	}
+	
+	return file, stat.Size(), nil
+}