Move to vitest

[Janpot]

• Migrated test configs to vitest format
• Migrated commands to use vitest run
• Make sure imports are used everywhere instead of relying on the globals
• Make sure testing library matchers work
• Make sure console logging detection works
• Changed one test which was testing whether an error was logged. Turns out it was faulty detecting an error related to the testing library.

[apedroferreira]

I had never heard about vitest, seems like a pretty straightforward replacement.
If it solves all the issues with ESM it sounds great!