建议提供 DNS 覆写功能

### 需求 / Requirement 我认为贵项目需要一个 DNS 覆盖功能来避免 DNS 泄露问题 ### 建议实现 / Suggested implements 建议在设置中提供相关选项 ### 备注 / Addition details _No response_ ### Clash Nyanpasu 版本号 / Clash Nyanpasu 1.4.1 ### 是否为 Pre-release / Is pre-release version 否 ### 自查步骤 / Verify steps - [ ] 如果您有足够的时间和能力，并愿意为此提交 PR，请勾上此复选框 / Pull request is welcome. Check this if you want to start a pull request - [x] 您已仔细查看并知情 [Q&A](https://nyanpasu.elaina.moe/zh-CN/others/issues) 中的内容 / You have checked [Q&A](https://nyanpasu.elaina.moe/others/issues) carefully - [x] 您已搜索过 [Issue Tracker](https://github.com/libnyanpasu/clash-nyanpasu/issues)，没有找到类似内容 / I have searched on [Issue Tracker](https://github.com/libnyanpasu/clash-nyanpasu/issues), No duplicate or related open issue has been found - [x] 您确保这个 Issue 只提及一个功能。如果您有多个功能请求，烦请发起多个 Issue / Ensure there is only one feature request in this issue. Please make multiply issue for multiply feature request - [x] 您确保已使用最新 Pre-release 版本测试，并且该功能在最新 Pre-release 版本中并未实现 / This feature have not implemented in latest Pre-release version