Enrich trembitaql

[vitaliihonta]

Add the following methods (like in sparksql):

• withColumn:

  case class Foo(i: Int, x: Long, s: String)
  case class Bar(ij: Long, ss: String)
  val pipeline: DataPipelineT[F, Bar, E] = ???
  pipeline.withColumn[Foo](_ / 2)

• select:

  case class Foo(i: Int, x: Long, s: String)
  case class Bar(ij: Long, ss: String)
  val pipeline: DataPipelineT[F, Foo, E] = ???
  pipeline.select[Bar](a => a.i + a.j, _.s * 2)