Add utility to convert path segments to a FS2 Path #27

[Babali42]

#27

The handling of Static directory is simplified from this

  val staticDirectoryRoute =
    Route(
      Request.get(Path / "kroptest" / "assets2" / Param.string),
      Response.StaticDirectory(Fs2Path("resources/kroptest/assets"))
    ).handle(Fs2Path(_))

To this

  val staticDirectoryRoute =
    Route(
      Request.get(Path / "kroptest" / "assets2" / AssetPath.fs2Path),
      Response.StaticDirectory(Fs2Path("resources/kroptest/assets"))
    ).passthrough

[noelwelsh]

Thanks!