Additional ways for specifying Scala version

[tgodzik]

Is your feature request related to a problem? Please describe.
It was suggested that maybe it would be useful to have additional 3.lts and 3.next to have up to date version for 3.3.x line and the 3.4.x+ one

Describe the solution you'd like
3.lts should lead to the current Scala 3 lts version and 3.next to the latest version.

Describe alternatives you've considered
Specify it manually.

Additional context

https://www.scala-lang.org/blog/2022/08/17/long-term-compatibility-plans.html

[Gedochao]

We might want to support lts and next, too (which generally would be the same as 3.lts and 3.next).
next should point to the most recent stable version.
We might also want informative messages for 2.13.lts, 2.12.lts etc. (there's no formal LTS for Scala 2, but users don't have to know that, so we should explain to them why those versions aren't valid identifiers)

[SethTisue]

Would 3.next behave any differently from just 3?

[tgodzik]

Would 3.next behave any differently from just 3?

Not really. So maybe it doesn't make sense to add it?