suggestion: isolate examples to remove friction with root folder

[arnaudambro]

I have some problems on my own to run vite-pwa on my project, so I try to see if your exampe is working properly

but I use yarn on my projects, and here I'm "forced"to use pnpm

and when I solve this problem (isolating the pwa-simple-pw and touch yarn.lock) then I have

> dev
> VIRTUAL_PWA_MODULE=true remix vite:dev

sh: remix: command not found

I think it would be GREAT if the examples where working isolates, with anyone choosing their own package manager they're used to

I could make a PR if you were interested

[userquin]

We're using pnpm as package manager and we enable shell-emulator in .npmrc file.