flatten modules to repo root, vendor deps, repair Eclipse build paths

Move api, engine, ui-console and ui-desktop out of modules/ up to the
repo root and drop the empty exception project (GuessMarketException now
lives in api).

Vendor gson, jaxb, okhttp, openjfx and tomcat under lib/, and group the
JUnit standalone jar into lib/junit/ alongside them.

Rewrite every .classpath: drop the copy-pasted optional="true" that was
masking real build path errors, point the library entries at ../lib/,
and put the JUnit jar on the test source folders so the placeholder
AppTest classes compile.

ui-desktop: take the JavaFX jars off the modulepath (there is no
module-info.java, so module="true" left the packages unresolvable) and
add a Launcher that calls Application.launch, avoiding the "JavaFX
runtime components are missing" check without VM arguments.

engine: add LocalGuessMarketService and the GuessMarketContext provider
interface, and give GuessMarketException the no-arg and cause
constructors they need.

6 files changed, 33 insertions, 0 deletions

diff --git a/api/src/main/java/market/guess/api/Commission.java b/api/src/main/java/market/guess/api/Commission.java
new file mode 100644
index 0000000..96cab8a
--- /dev/null
+++ b/api/src/main/java/market/guess/api/Commission.java
@@ -0,0 +1,3 @@
+package market.guess.api;
+
+public record Commission(CommissionChargeType type, int percentage) {}
diff --git a/api/src/main/java/market/guess/api/CommissionChargeType.java b/api/src/main/java/market/guess/api/CommissionChargeType.java
new file mode 100644
index 0000000..75e409b
--- /dev/null
+++ b/api/src/main/java/market/guess/api/CommissionChargeType.java
@@ -0,0 +1,6 @@
+package market.guess.api;
+
+public enum CommissionChargeType {
+  ON_CLOSE,
+  ON_PURCHASE
+}
diff --git a/api/src/main/java/market/guess/api/EventDTO.java b/api/src/main/java/market/guess/api/EventDTO.java
new file mode 100644
index 0000000..66b2312
--- /dev/null
+++ b/api/src/main/java/market/guess/api/EventDTO.java
@@ -0,0 +1 @@
+package market.guess.api;
diff --git a/api/src/main/java/market/guess/api/EventStatus.java b/api/src/main/java/market/guess/api/EventStatus.java
new file mode 100644
index 0000000..acd7542
--- /dev/null
+++ b/api/src/main/java/market/guess/api/EventStatus.java
@@ -0,0 +1,7 @@
+package market.guess.api;
+
+public enum EventStatus {
+  NOT_STARTED,
+  ACTIVE,
+  CLOSED
+}
diff --git a/api/src/main/java/market/guess/api/LoadResultDTO.java b/api/src/main/java/market/guess/api/LoadResultDTO.java
new file mode 100644
index 0000000..cf3630b
--- /dev/null
+++ b/api/src/main/java/market/guess/api/LoadResultDTO.java
@@ -0,0 +1,3 @@
+package market.guess.api;
+
+public record LoadResultDTO() {}
diff --git a/api/src/main/java/market/guess/exception/GuessMarketException.java b/api/src/main/java/market/guess/exception/GuessMarketException.java
new file mode 100644
index 0000000..e2e486c
--- /dev/null
+++ b/api/src/main/java/market/guess/exception/GuessMarketException.java
@@ -0,0 +1,13 @@
+package market.guess.exception;
+
+public class GuessMarketException extends Exception {
+  public GuessMarketException() {}
+
+  public GuessMarketException(String message) {
+    super(message);
+  }
+
+  public GuessMarketException(String message, Throwable cause) {
+    super(message, cause);
+  }
+}