Reconstructed the file field type.
Refactored the code of the number field type.
Removed redundant lines.
- Reconstructed the export field type.
- Added an example of setting a custom exporting data in the demo plugin.
- Fixed a bug in the export setting class.
- Added an option in the getArray method of the debug class not to escape the output.
Updated the inline documentation of the addSettingFields() method.
Reconstructed the import field type.