[ci skip] add test plugin module

test-plugin/src/main/java/org/purpurmc/testplugin/TestPlugin.java

@@ -0,0 +1,12 @@
+package org.purpurmc.testplugin;
+
+import org.bukkit.event.Listener;
+import org.bukkit.plugin.java.JavaPlugin;
+
+public class TestPlugin extends JavaPlugin implements Listener {
+
+    @Override
+    public void onEnable() {
+        this.getServer().getPluginManager().registerEvents(this, this);
+    }
+}

test-plugin/src/main/java/org/purpurmc/testplugin/TestPluginBootstrap.java

@@ -0,0 +1,4 @@
+package org.purpurmc.testplugin;
+
+public class TestPluginBootstrap {
+}

test-plugin/src/main/java/org/purpurmc/testplugin/TestPluginLoader.java

@@ -0,0 +1,4 @@
+package org.purpurmc.testplugin;
+
+public class TestPluginLoader {
+}