[ci skip] Add a test plugin (#6133)

test-plugin/build.gradle.kts

@@ -0,0 +1,17 @@
+version = "1.0.0-SNAPSHOT"
+
+repositories {
+    maven("https://libraries.minecraft.net")
+}
+
+dependencies {
+    compileOnly(project(":Paper-API"))
+    compileOnly(project(":Paper-MojangAPI"))
+}
+
+tasks.processResources {
+    inputs.property("version", project.version)
+    filesMatching("plugin.yml") {
+        expand("version" to project.version)
+    }
+}

test-plugin/src/main/java/io/papermc/paper/testplugin/TestPlugin.java

@@ -0,0 +1,11 @@
+package io.papermc.paper.testplugin;
+
+import org.bukkit.event.Listener;
+import org.bukkit.plugin.java.JavaPlugin;
+
+public final class TestPlugin extends JavaPlugin implements Listener {
+    @Override
+    public void onEnable() {
+        this.getServer().getPluginManager().registerEvents(this, this);
+    }
+}

test-plugin/src/main/resources/plugin.yml

@@ -0,0 +1,7 @@
+name: Paper-Test-Plugin
+version: ${version}
+main: io.papermc.paper.testplugin.TestPlugin
+description: Paper Test Plugin
+author: PaperMC
+api-version: 1.17
+load: STARTUP