rgehbt

solve type warn in Flat Config 

fix(vite-plugin): HMR execute error by no vineStyle

1

On dev with HMR:  [Reproduction](https://github.com/Gehbt/vue-vine-bug-repo)

`generatePageImport` error handling path variable of win32 style

6

I tried running the example on repo in **windows**, an warning occurred. And vite serve is broken.  By tracing, It seems by the `root.insert` call node variable `__dirname`. It...

fix [440](https://github.com/posva/unplugin-vue-router/issues/440), by replace backslash.