feat: enhance FenExporter with detailed FEN string generation and refactor PgnExporter for improved game context export

modules/core/src/main/scala/de/nowchess/chess/resource/GameResource.scala

@@ -4,7 +4,6 @@ import com.fasterxml.jackson.databind.ObjectMapper
 import de.nowchess.api.board.Square
 import de.nowchess.api.dto.*
 import de.nowchess.api.game.{DrawReason, GameContext, GameResult}
-import de.nowchess.api.io.FenExporter
 import de.nowchess.api.move.{Move, MoveType, PromotionPiece}
 import de.nowchess.api.player.{PlayerId, PlayerInfo}
 import de.nowchess.chess.client.IoServiceClient
@@ -13,7 +12,6 @@ import de.nowchess.chess.engine.GameEngine
 import de.nowchess.chess.exception.{BadRequestException, GameNotFoundException}
 import de.nowchess.chess.observer.*
 import de.nowchess.chess.registry.{GameEntry, GameRegistry}
-import de.nowchess.rules.pgn.PgnExporter
 import io.smallrye.mutiny.Multi
 import jakarta.enterprise.context.ApplicationScoped
 import jakarta.inject.Inject
@@ -88,16 +86,8 @@ class GameResource:
   private def toGameStateDto(entry: GameEntry): GameStateDto =
     val ctx = entry.engine.context
     GameStateDto(
-      fen = FenExporter.exportGameContext(ctx),
-      pgn = PgnExporter.exportGame(
-        Map(
-          "Event"  -> "NowChess game",
-          "White"  -> entry.white.displayName,
-          "Black"  -> entry.black.displayName,
-          "Result" -> "*",
-        ),
-        ctx.moves,
-      ),
+      fen = ioClient.exportFen(ctx),
+      pgn = ioClient.exportPgn(ctx),
       turn = ctx.turn.label.toLowerCase,
       status = statusOf(entry),
       winner = ctx.result.collect { case GameResult.Win(c) => c.label.toLowerCase },

modules/core/src/test/scala/de/nowchess/chess/engine/GameEngineLoadGameTest.scala

@@ -1,16 +1,13 @@
 package de.nowchess.chess.engine
 
-import scala.collection.mutable
-import de.nowchess.api.board.{Board, Color}
-import de.nowchess.api.game.GameContext
-import de.nowchess.chess.observer.{GameEvent, Observer, PgnLoadedEvent}
-import de.nowchess.api.io.FenExporter
+import de.nowchess.chess.observer.{GameEvent, Observer}
 import de.nowchess.io.fen.FenParser
-import de.nowchess.io.pgn.PgnParser
-import de.nowchess.rules.pgn.PgnExporter
+import de.nowchess.io.pgn.{PgnExporter, PgnParser}
 import org.scalatest.funsuite.AnyFunSuite
 import org.scalatest.matchers.should.Matchers
 
+import scala.collection.mutable
+
 class GameEngineLoadGameTest extends AnyFunSuite with Matchers:
 
   test("loadGame with PgnParser: loads valid PGN and enables undo/redo"):

modules/core/src/test/scala/de/nowchess/chess/resource/GameResourceIntegrationTest.scala

@@ -4,7 +4,7 @@ import de.nowchess.api.dto.*
 import de.nowchess.api.game.GameContext
 import de.nowchess.chess.client.IoServiceClient
 import de.nowchess.chess.exception.BadRequestException
-import de.nowchess.api.io.FenExporter
+import de.nowchess.io.fen.FenExporter
 import de.nowchess.io.pgn.PgnParser
 import io.quarkus.test.InjectMock
 import io.quarkus.test.junit.QuarkusTest