Use ClassTag instead Manifest

[xuwei-k]

• depends on Update mimaPreviousArtifacts #491
• This change is fully binary compatible if mima is correct
• [2.x] use ClassTag instead of deprecated scala.reflect.Manifest #373

[xuwei-k]

• 😢 [WIP] Update scalafmt config #484

[error] org.scalafmt.sbt.ScalafmtSbtReporter$ScalafmtSbtError: scalafmt: [3.10.7] /home/runner/work/io/io/io/src/main/scala/sbt/io/IO.scala:94: error: [dialect scala212source3 [with overrides]] `identifier` expected but `:` found
[error]   def classLocationPath[A](using tag: ClassTag[A]): NioPath =
[error]                                     ^ [/home/runner/work/io/io/io/src/main/scala/sbt/io/IO.scala]
[error] (io / Compile / scalafmtCheck) org.scalafmt.sbt.ScalafmtSbtReporter$ScalafmtSbtError: scalafmt: [3.10.7] /home/runner/work/io/io/io/src/main/scala/sbt/io/IO.scala:94: error: [dialect scala212source3 [with overrides]] `identifier` expected but `:` found
[error]   def classLocationPath[A](using tag: ClassTag[A]): NioPath =
[error]                                     ^ [/home/runner/work/io/io/io/src/main/scala/sbt/io/IO.scala]
[error] Total time: 6 s, completed Mar 1, 2026, 11:23:40 AM

[eed3si9n]

As long as Manifest keeps functioning in Scala 3, I don't think we need to replace it?