FEATURE: VITE_BASE能动态获取吗

### Version Vben Admin V5 ### Description VITE_BASE在部署二级目录时,经常要重新打包,非常的不方便,能否从某个地方动态获取,比如环境变量,配置文件等其他任何可动态的地方 ### Proposed Solution 问了下ai貌似是可以的,但改动太多,因为太菜,不敢动手. ### Alternatives Considered _No response_ ### Additional Context _No response_ ### Validations - [x] Read the [docs](https://doc.vben.pro/) - [x] Ensure the code is up to date. (Some issues have been fixed in the latest version) - [x] I have searched the [existing issues](https://github.com/vbenjs/vue-vben-admin/issues) and checked that my issue does not duplicate any existing issues.