feat: refactor IO module to API structure and add FEN export functionality

modules/core/src/main/scala/de/nowchess/chess/client/IoServiceClient.scala

@@ -1,7 +1,7 @@
 package de.nowchess.chess.client
 
+import de.nowchess.api.dto.{ImportFenRequest, ImportPgnRequest}
 import de.nowchess.api.game.GameContext
-import de.nowchess.io.service.dto.{ImportFenRequest, ImportPgnRequest}
 import jakarta.ws.rs.*
 import jakarta.ws.rs.core.MediaType
 import org.eclipse.microprofile.rest.client.inject.RegisterRestClient

modules/core/src/main/scala/de/nowchess/chess/config/JacksonConfig.scala

@@ -5,7 +5,6 @@ import com.fasterxml.jackson.databind.ObjectMapper
 import com.fasterxml.jackson.databind.module.SimpleModule
 import com.fasterxml.jackson.module.scala.DefaultScalaModule
 import de.nowchess.api.board.Square
-import de.nowchess.io.json.{SquareKeyDeserializer, SquareKeySerializer}
 import io.quarkus.jackson.ObjectMapperCustomizer
 import jakarta.inject.Singleton
 

modules/core/src/main/scala/de/nowchess/chess/config/SquareKeyDeserializer.scala

@@ -0,0 +1,8 @@
+package de.nowchess.chess.config
+
+import com.fasterxml.jackson.databind.{DeserializationContext, KeyDeserializer}
+import de.nowchess.api.board.Square
+
+class SquareKeyDeserializer extends KeyDeserializer:
+  override def deserializeKey(key: String, ctx: DeserializationContext): AnyRef =
+    Square.fromAlgebraic(key).orNull

modules/core/src/main/scala/de/nowchess/chess/config/SquareKeySerializer.scala

@@ -0,0 +1,9 @@
+package de.nowchess.chess.config
+
+import com.fasterxml.jackson.core.JsonGenerator
+import com.fasterxml.jackson.databind.{JsonSerializer, SerializerProvider}
+import de.nowchess.api.board.Square
+
+class SquareKeySerializer extends JsonSerializer[Square]:
+  override def serialize(value: Square, gen: JsonGenerator, provider: SerializerProvider): Unit =
+    gen.writeFieldName(value.toString)

modules/core/src/main/scala/de/nowchess/chess/engine/GameEngine.scala

@@ -7,7 +7,7 @@ import de.nowchess.api.player.{PlayerId, PlayerInfo}
 import de.nowchess.chess.controller.Parser
 import de.nowchess.chess.observer.*
 import de.nowchess.chess.command.{CommandInvoker, MoveCommand, MoveResult}
-import de.nowchess.io.{GameContextExport, GameContextImport}
+import de.nowchess.api.io.{GameContextExport, GameContextImport}
 import de.nowchess.rules.RuleSet
 import de.nowchess.rules.sets.DefaultRules
 

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

@@ -4,6 +4,7 @@ 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
@@ -12,9 +13,7 @@ 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.io.fen.FenExporter
-import de.nowchess.io.pgn.PgnExporter
-import de.nowchess.io.service.dto.{ImportFenRequest, ImportPgnRequest}
+import de.nowchess.rules.pgn.PgnExporter
 import io.smallrye.mutiny.Multi
 import jakarta.enterprise.context.ApplicationScoped
 import jakarta.inject.Inject

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

@@ -4,7 +4,7 @@ import de.nowchess.api.board.{Board, Color, File, PieceType, Rank, Square}
 import de.nowchess.api.game.GameContext
 import de.nowchess.api.move.{Move, MoveType, PromotionPiece}
 import de.nowchess.chess.observer.{GameEvent, InvalidMoveEvent, InvalidMoveReason, MoveRedoneEvent, Observer}
-import de.nowchess.io.GameContextImport
+import de.nowchess.api.io.GameContextImport
 import de.nowchess.rules.RuleSet
 import de.nowchess.rules.sets.DefaultRules
 import org.scalatest.funsuite.AnyFunSuite

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

@@ -4,10 +4,10 @@ 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.io.pgn.PgnParser
+import de.nowchess.api.io.FenExporter
 import de.nowchess.io.fen.FenParser
-import de.nowchess.io.pgn.PgnExporter
-import de.nowchess.io.fen.FenExporter
+import de.nowchess.io.pgn.PgnParser
+import de.nowchess.rules.pgn.PgnExporter
 import org.scalatest.funsuite.AnyFunSuite
 import org.scalatest.matchers.should.Matchers
 

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.io.fen.FenExporter
+import de.nowchess.api.io.FenExporter
 import de.nowchess.io.pgn.PgnParser
 import io.quarkus.test.InjectMock
 import io.quarkus.test.junit.QuarkusTest