Basic support for ESM

[fvictorio]

Closes #3043
Closes #3240
Closes #2927

This PR:

• Adds support for having scripts and tests in ESM
• Adds a new advanced guide about this
• Upgrades typescript and ts-node. This was done in a previous iteration, when we wanted to have support for ESM in TypeScript projects. We decided we won't do that, but I think we can keep the upgraded packages.
• Makes some changes to the project initialization:
  • If the project has a package.json with "type": "module", the options shown are a bit different
  • There's a new javascript-esm sample project
  • I also made some changes to how we handle the project initialization if the directory already has files. Basically: we skip the README.md file if there's already one, and we properly check for clashing files, not directories.
• There's also a small change in the Toolbox to handle Hardhat config files with the .cjs extension.

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[changeset-bot]

🦋 Changeset detected

Latest commit: db79940

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@nomicfoundation/hardhat-toolbox	Patch
hardhat	Minor

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[fvictorio]

Closing in favor of #3550