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.

9 files changed, 87 insertions, 0 deletions

diff --git a/api/.classpath b/api/.classpath
new file mode 100644
index 0000000..0e305bc
--- /dev/null
+++ b/api/.classpath
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+    <!-- Defines your source folder -->
+  <classpathentry kind="src" output="bin/classes" path="src/main/java"/> 
+  <classpathentry kind="src" output="bin/test-classes" path="src/test/java">
+    <attributes>
+      <attribute name="test" value="true"/>
+    </attributes>
+  </classpathentry>
+  <classpathentry kind="lib" path="../lib/junit/junit-platform-console-standalone-6.1.1.jar"/>
+  <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+  <classpathentry kind="output" path="bin"/>
+</classpath>
+
diff --git a/api/.project b/api/.project
new file mode 100644
index 0000000..0dc50c5
--- /dev/null
+++ b/api/.project
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+        <name>guess-market-api</name>
+        <comment></comment>
+        <projects>
+        </projects>
+        <buildSpec>
+                <buildCommand>
+                        <name>org.eclipse.jdt.core.javabuilder</name>
+                        <arguments>
+                        </arguments>
+                </buildCommand>
+        </buildSpec>
+        <natures>
+                <nature>org.eclipse.jdt.core.javanature</nature>
+        </natures>
+        <filteredResources>
+                <filter>
+                        <id>1786044291084</id>
+                        <name></name>
+                        <type>30</type>
+                        <matcher>
+                                <id>org.eclipse.core.resources.regexFilterMatcher</id>
+                                <arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+                        </matcher>
+                </filter>
+        </filteredResources>
+</projectDescription>
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);
+  }
+}
diff --git a/api/src/test/java/market/guess/api/AppTest.java b/api/src/test/java/market/guess/api/AppTest.java
new file mode 100644
index 0000000..b5883d6
--- /dev/null
+++ b/api/src/test/java/market/guess/api/AppTest.java
@@ -0,0 +1,12 @@
+package market.guess.api;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+
+public class AppTest {
+  @Test
+  void deterministicTest() {
+    assertTrue(true);
+  }
+}