bug: Multiple extension support

[twilwa]

Is there an existing issue for this?

• I have looked through the existing issues

Which method was used to setup Scaffold-ETH 2 ?

npx create-eth@latest

Current Behavior

Not sure if it's intended, but you can only use one extension at a time -- i wanted to use onchainkit, erc-20, and erc-721 (as well as a few from the most recent hackathon, actually :3) but found the npx command didn't support more than one extension

Expected Behavior

-e should take multiple args

Steps To Reproduce

'pnpm dlx create-eth@latest -e erc-20 erc-721 onchainkit'

Anything else?

No response