Set up V2 project: Lint

[thien-remote]

(Look like we haven't had a PR template?)

TL;DR:

Hey 👋 This PR set up a new project called "next". This is going to be the working place for Version 2 of JSON Schema Form, see Linear.

(This is a sponsored work from Remote, so there might be Remote's internal URLs like above in this description. I'll try to keep that to a minimum though.)

Overview

I actually end up with setting up the lint first 😅 I think it's good to have the automated lint in as soon as possible, so we will have less chance of code style or format conflicts in the future.

Instead of the 10+ direct dependencies just for setting up ESLint in V1, I opt to use antfu/eslint-config in V2. This means:

1. We are on latest ESLint!
2. We have only 1 dependency! Albeit we still have a huge lock file, that can't be helped.
3. Did I mention we no longer need Prettier?

Another thing is the version will start with .alpha suffix. This is both to indicate the work-in-progress nature of the package, and also to reduce confusion with the "beta" tag we are using in V1.

It's worth to note that we will still use the "dev" tag and "dev" suffix like V1 though. That will be cover in a different PR for release.

[thien-remote]

Hey reviewers 👋 (I suppose you should receive the notification so no extra tagging here)

Do you think we could review this one as-is, or do you want to wait until we have a complete workflow (build + test + release)?

[lukad]

Looks good, @thien-remote.
I don't have any strong oppinions on the linter config, etc.