分片上传

### Please make sure of the following things

- [X] I have read the [documentation](https://alist.nn.ci).
- [ ] I'm sure there are no duplicate issues or discussions.
- [X] I'm sure this feature is not implemented.
- [X] I'm sure it's a reasonable and popular requirement.

### Description of the feature / 需求描述

尊敬的开发者:
您好！我已阅读alist文档中调整nginx来解决大文件上传问题，但出于安全考虑，我必须使用cloudflare保护我的网站，但由于cloudflare的100mb上传限制,我无法在alist上上传大于100mb,文件，希望您可以添加上传分片开关，并设置分片大小，谢谢！

### Suggested solution / 实现思路

你可以参照开源网盘cloudreve的上传分片

### Additional context / 附件

Cannot read properties of undefined (reading 'status')
无法读取性质的定义(阅读"状态")