feat: BAC-30 Implement Jackson Mapping via DTOs (#102)

Reviewed-on: #102
Co-authored-by: Janis <janis.e.20@gmx.de>
Co-committed-by: Janis <janis.e.20@gmx.de>

knockoutwhistweb/app/dto/subDTO/PlayerDTO.scala

@@ -0,0 +1,17 @@
+package dto.subDTO
+
+import de.knockoutwhist.player.AbstractPlayer
+
+case class PlayerDTO(id: String, name: String, dogLife: Boolean) 
+
+object PlayerDTO {
+  
+  def apply(player: AbstractPlayer): PlayerDTO = {
+    PlayerDTO(
+      id = player.id.toString,
+      name = player.name,
+      dogLife = player.isInDogLife
+    )
+  }
+  
+}