feat(binding): add AsyncPlugin as entry point for Async library

Introduces AsyncPlugin to serve as a standalone library-plugin entry point for the Async library. This allows other plugins to depend on Async without bundling it directly. The plugin installs a disconnect hook on start and ensures proper shutdown of tracked scopes.

binding/src/main/kotlin/com/mythlane/async/binding/AsyncPlugin.kt

@@ -0,0 +1,23 @@
+package com.mythlane.async.binding
+
+import com.hypixel.hytale.server.core.plugin.JavaPlugin
+import com.hypixel.hytale.server.core.plugin.JavaPluginInit
+import com.mythlane.async.Async
+
+/**
+ * Standalone library-plugin entry point. Drop the shaded jar in `mods/` and
+ * other plugins can depend on Async without bundling it themselves.
+ *
+ * Installs the disconnect hook on start and drains every tracked scope on
+ * shutdown. Plugins that bundle Async directly should keep calling
+ * [installAsync] and [Async.shutdown] themselves and not rely on this class.
+ */
+class AsyncPlugin(init: JavaPluginInit) : JavaPlugin(init) {
+    override fun start() {
+        installAsync()
+    }
+
+    override fun shutdown() {
+        Async.shutdown()
+    }
+}

dist/src/main/resources/manifest.json

@@ -0,0 +1,16 @@
+{
+  "Group": "Mythlane",
+  "Name": "Async",
+  "Version": "0.1.0",
+  "Description": "Kotlin coroutines for Hytale plugins. Thread-safe ECS access, off-thread blocking I/O, and automatic cancellation on disconnect or world unload.",
+  "Authors": [
+    { "Name": "Mythlane", "Email": "contact@mythlane.com", "Url": "https://mythlane.com" }
+  ],
+  "Website": "https://mythlane.com",
+  "Main": "com.mythlane.async.binding.AsyncPlugin",
+  "ServerVersion": "2026.03.26-89796e57b",
+  "Dependencies": {},
+  "OptionalDependencies": {},
+  "DisabledByDefault": false,
+  "IncludesAssetPack": false
+}