Add project name to examples/with-three-js create command (#17256)
Add project name to examples/with-three-js create command (#17256)

This is a change to add the project name as in the other examples.
When we run with the current create command, we are asked for the project name.
As follows:

```
$ npx create-next-app --example with-three-js
? What is your project named? › my-app
```
flybayer/next.js,azukaru/next.js,zeit/next.js,JeromeFitz/next.js,azukaru/next.js,azukaru/next.js,flybayer/next.js,zeit/next.js,azukaru/next.js,JeromeFitz/next.js,JeromeFitz/next.js,JeromeFitz/next.js,flybayer/next.js,zeit/next.js,flybayer/next.js