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.

1 files changed, 5 insertions, 0 deletions

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();
+}