Upgrade to support eslint@v9

[phun-ky]

• chore!: Upgrade to , and update eslint setup

Warning

This PR is not complete, but some of the heavy lifting to prepare for v9 is done. Feel free to continue!

It is including, but not limited to:

• New set of eslint rules
• New set of prettier rules
• Approaching a TS setup instead of vanilla
• Replacing (not complete) jest with vitest
• Replacing babel with vite (not started)

✅ Closes: #947 #1015

[changeset-bot]

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Latest commit: 7198060

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