Updates and remove redundant settings

[keynmol]

1. Update versions (scala 3 lts, native version)
2. Remove redundant native config settings – not only were the comments and values out of sync, but I think it's best to provide a minimal config relying on defaults.
3. Enable source level debugging – for nicer stacktraces and debug information.
4. Use Scala 3 syntax

[ekrich]

These were here to help people with these basic settings (using the defaults) with some suggestions in the comments for settings you might want to select - maybe the comments where not explained well but that was deliberate as the first thing people asked for was how to optimize and such.