refactor: standardize design

Signed-off-by: Sebastian Krupinski <krupinski01@gmail.com>

src/composables/index.ts

@@ -5,7 +5,9 @@
 export { useFileManager } from './useFileManager'
 export { useFileSelection } from './useFileSelection'
 export { useFileUpload } from './useFileUpload'
+export { useFileViewer } from './useFileViewer'
 
 export type { UseFileManagerOptions } from './useFileManager'
 export type { UseFileSelectionOptions } from './useFileSelection'
 export type { UseFileUploadOptions, FileUploadProgress } from './useFileUpload'
+export type { UseFileViewerReturn } from './useFileViewer'