processor

type FileHandler interface {
	LoadImage(path string) (image.Image, error)
	SaveImage(img image.Image, path, format string, cfg *config.Config) error
	CreateDir(path string) error
	ReadDir(path string) ([]os.DirEntry, error)
}

type ImageProcessor struct {
	Watermark     image.Image
	OutputDir     string
	Config        *config.Config
	WatermarkMode string
	FileHandler   FileHandler
}

type ProgressCallback func(current, total int, img *canvas.Image, fileName string)