Feat: add "Fold" command

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/app/commands/game/fold/PlayerFoldHandler.java

@@ -0,0 +1,19 @@
+package ch.unibas.dmi.dbis.cs108.casono.server.app.commands.game.fold;
+
+import ch.unibas.dmi.dbis.cs108.casono.server.network.command.execution.CommandHandler;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.response.OkResponse;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.response.dispatcher.ResponseDispatcher;
+
+/** Minimal handler for FOLD: acknowledges the command. */
+public class PlayerFoldHandler extends CommandHandler<PlayerFoldRequest> {
+
+    public PlayerFoldHandler(ResponseDispatcher responseDispatcher) {
+        super(responseDispatcher);
+    }
+
+    @Override
+    public void execute(PlayerFoldRequest request) {
+        // TODO: integrate with game engine to process call.
+        responseDispatcher.dispatch(new OkResponse(request.getContext()));
+    }
+}

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/app/commands/game/fold/PlayerFoldParser.java

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+package ch.unibas.dmi.dbis.cs108.casono.server.app.commands.game.fold;
+
+import ch.unibas.dmi.dbis.cs108.casono.server.network.command.parsing.CommandParser;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.PrimitiveRequest;
+
+/** Parser for the FOLD command (no parameters). */
+public class PlayerFoldParser implements CommandParser<PlayerFoldRequest> {
+    @Override
+    public PlayerFoldRequest parse(PrimitiveRequest primitiveRequest) {
+        return new PlayerFoldRequest(primitiveRequest.context());
+    }
+}

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/app/commands/game/fold/PlayerFoldRequest.java

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+package ch.unibas.dmi.dbis.cs108.casono.server.app.commands.game.fold;
+
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.Request;
+import ch.unibas.dmi.dbis.cs108.casono.server.network.protocol.request.RequestContext;
+
+/** Request for FOLD command. */
+public class PlayerFoldRequest extends Request {
+    public PlayerFoldRequest(RequestContext context) {
+        super(context);
+    }
+}