add an option to configure wildcards as in scala 2 style

[mlachkar]

When adding -xSouce3, intellij start changing all the wildcard (_) with the new syntax *. Maybe we can have some configuration to have only one style across the code.

[EnviousSwan]

When adding -xSouce3, intellij start changing all the wildcard (_) with the new syntax *. Maybe we can have some configuration to have only one style across the code.

There's a scalafix rule to rewrite all _ to the new * in https://github.com/xuwei-k/scalafix-rules https://github.com/xuwei-k/scalafix-rules/blob/main/rules/src/main/scala/fix/Scala3ImportRewrite.scala

So it should be really easy to write a rule that does the opposite 🤔