Move I/O provider abstraction to ui-console, add ledger/account/problem DTOs

InputProvider/OutputProvider were api-layer types only ever implemented
by the console UI; relocate them there. Drop the unused
GuessMarketEngine/LocalGuessMarketService pair, flesh out LoadResultDTO
with success/failure variants, and make LocalGuessMarketContext.LoadAsync
report real outcomes instead of an empty placeholder.

1 files changed, 0 insertions, 7 deletions

diff --git a/api/src/main/java/market/guess/OutputProvider.java b/api/src/main/java/market/guess/OutputProvider.java
deleted file mode 100644
index 774408e..0000000
--- a/api/src/main/java/market/guess/OutputProvider.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package market.guess;
-
-public interface OutputProvider {
-  void print(Object object);
-
-  void println(Object object);
-}