extensions/to_upload_file/xfile_upload_extension library

1. image_core package
2. documentation
3. extensions/to_upload_file/xfile_upload_extension.dart

image_core package

1. Libraries
2. data/enums/file_category
3. data/models/upload_file
4. extensions/file_name_generator
5. extensions/string_file_extension_ext
6. extensions/to_upload_file/file_upload_extension
7. extensions/to_upload_file/platform_file_upload_extension
8. extensions/to_upload_file/xfile_upload_extension
9. image_core
10. utils/content_type_util
11. utils/file_category_resolver