[Feature] Handle limited access like real WeChat | 像原版微信一样处理“有限访问”

[mdogwoop]

Version information

• Device: e.g. iPhone X
• OS: e.g. iOS 14.7.1
• Package Version: e.g. v2.4.1
• Flutter Version: e.g. v2.5.0

Is your feature request related to a problem?

本项目在6.0.0版本之后本项目支持了有限访问功能（#125），但是本项目处理有限访问功能有点令人反感，在每次打开这个photo picker的时候都会弹出一个建议允许访问全部媒体文件

After version 6.0.0, this project introduced limited access functionality (#125). However, the handling of limited access features in this project has been somewhat objectionable, as a prompt suggesting full media file access permission appears every time the photo picker is opened.
Describe the solution you'd like

希望学习微信的处理方式

I hope to adopt WeChat's approach for reference.

Describe alternatives you've considered

也可以选择加入一个“不再提示”功能

Alternatively, consider adding a "Don't Show Again" option.

Additional context

The English part is translated using Google and Deepseek. Please correct me if there are any mistakes in my expression.

[AlexV525]

也可以选择加入一个“不再提示”功能

https://github.com/fluttercandies/flutter_wechat_assets_picker/blob/main/README-ZH.md#%E7%AE%80%E5%8D%95%E7%9A%84%E4%BD%BF%E7%94%A8%E6%96%B9%E6%B3%95 开 issue 前可以确保自己有阅读文档的习惯。

你引用了一个4年前实现的功能来对比最新的微信，有可能有部分东西过时了但造成「令人反感」的体验并不是有意为之，而是微信本来就是这样做的，有时间问候开源库作者不如先问候下张小龙，还有把自己那带味儿的情绪收一下，开源不是情绪大乱斗，有事说事。

本 issue 保留至相关行为调整为对齐最新微信版本。