Adapt readme and contributing guide to create-eth repo

[Pabl0cks]

Initial tweaks to adapt old SE-2 Readme and Contributing guide to new create-eth repo.

Maybe I deleted too much stuff in Readme for a initial iteration, we can get back basic SE-2 screenshot and features from initial part of the Readme if you prefer 🙌

Fixes #10

[rin-st]

Lgtm!

[carletex]

This looks great @Pabl0cks Thank you!

left a comment in case you guys see it interesting to add.

[technophile-04]

Tysm @Pabl0cks, looking great !

One thing I would like to mention maybe not in this PR and maybe after #25 is after point 1. in qucikstart after foundry hint maybe we could mention that checkout generated README for more details on getting started / commands (maybe we could also mention this at end)

^ But yeah lol it might be not needed since after #25 we will be already mentioning this at the end in CLI output 🙌

[Pabl0cks]

One thing I would like to mention maybe not in this PR and maybe after #25 is after point 1. in qucikstart after foundry hint maybe we could mention that checkout generated README for more details on getting started / commands (maybe we could also mention this at end)

Yep, nice idea! 🙌

Not sure where the best place would be. What about in Documentation section (maybe the name of the section could be tweaked a bit), and the content could be something like this:

• Check out the README.md generated in your instance folder for more details about getting started / commands.
• Visit our docs to learn how to start building with Scaffold-ETH 2.
• To know more about SE-2 features, check out our website.

Not so sure about the location, just thinking out loud!

[carletex]

I think this is a great starting point!

Thank you all!