Move engine contracts to api module, add I/O provider abstraction and PicoContainer wiring

Relocates GuessMarketEngine/GuessMarketContext into market.guess.api so
engine and ui-console depend on a shared contract instead of engine
internals, and makes context loading async (CompletableFuture). Adds
InputProvider/OutputProvider interfaces with console implementations,
wires the console app's Menu through a PicoContainer, and adds the
generated model classes plus vendored picocontainer jar needed to build it.

7 files changed, 55 insertions, 0 deletions

diff --git a/api/src/main/java/market/guess/InputProvider.java b/api/src/main/java/market/guess/InputProvider.java
new file mode 100644
index 0000000..be7372b
--- /dev/null
+++ b/api/src/main/java/market/guess/InputProvider.java
@@ -0,0 +1,5 @@
+package market.guess;
+
+public interface InputProvider extends AutoCloseable {
+  int nextInt();
+}
diff --git a/api/src/main/java/market/guess/InputProviderFactory.java b/api/src/main/java/market/guess/InputProviderFactory.java
new file mode 100644
index 0000000..6801103
--- /dev/null
+++ b/api/src/main/java/market/guess/InputProviderFactory.java
@@ -0,0 +1,5 @@
+package market.guess;
+
+public interface InputProviderFactory {
+  InputProvider create();
+}
diff --git a/api/src/main/java/market/guess/OutputProvider.java b/api/src/main/java/market/guess/OutputProvider.java
new file mode 100644
index 0000000..774408e
--- /dev/null
+++ b/api/src/main/java/market/guess/OutputProvider.java
@@ -0,0 +1,7 @@
+package market.guess;
+
+public interface OutputProvider {
+  void print(Object object);
+
+  void println(Object object);
+}
diff --git a/api/src/main/java/market/guess/OutputProviderFactory.java b/api/src/main/java/market/guess/OutputProviderFactory.java
new file mode 100644
index 0000000..b4eb7f5
--- /dev/null
+++ b/api/src/main/java/market/guess/OutputProviderFactory.java
@@ -0,0 +1,5 @@
+package market.guess;
+
+public interface OutputProviderFactory {
+  OutputProvider create();
+}
diff --git a/api/src/main/java/market/guess/api/EventDTO.java b/api/src/main/java/market/guess/api/EventDTO.java
index 66b2312..2b2bc63 100644
--- a/api/src/main/java/market/guess/api/EventDTO.java
+++ b/api/src/main/java/market/guess/api/EventDTO.java
@@ -1 +1,9 @@
 package market.guess.api;
+
+public record EventDTO(
+    int id,
+    String name,
+    String description,
+    int commission,
+    CommissionChargeType commissionChargeType,
+    EventStatus status) {}
diff --git a/api/src/main/java/market/guess/api/GuessMarketContext.java b/api/src/main/java/market/guess/api/GuessMarketContext.java
new file mode 100644
index 0000000..12ffbeb
--- /dev/null
+++ b/api/src/main/java/market/guess/api/GuessMarketContext.java
@@ -0,0 +1,18 @@
+package market.guess.api;
+
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+
+public interface GuessMarketContext {
+  CompletableFuture<LoadResultDTO> LoadAsync();
+
+  void SaveChangesAsync();
+
+  List<EventDTO> GetAllEventsAsync();
+
+  void GetEventInfoByIdAsync();
+
+  void CreateEventAsync();
+
+  void UpdateEventAsync();
+}
diff --git a/api/src/main/java/market/guess/api/GuessMarketEngine.java b/api/src/main/java/market/guess/api/GuessMarketEngine.java
new file mode 100644
index 0000000..b6d44a4
--- /dev/null
+++ b/api/src/main/java/market/guess/api/GuessMarketEngine.java
@@ -0,0 +1,7 @@
+package market.guess.api;
+
+import java.util.concurrent.CompletableFuture;
+
+public interface GuessMarketEngine {
+  CompletableFuture<LoadResultDTO> loadEvents();
+}