Native noise packaging

- Default artifacts carry the CPU native noise libraries inside the packed payload

- Java 21 modded jars exclude Java 25 native classes

gradle/java21-runtime-exclusions.gradle

@@ -0,0 +1,27 @@
+/*
+ * Iris is a World Generator for Minecraft Servers
+ * Copyright (c) 2026 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+ext.java21RuntimeExclusions = [
+    'art/arcane/volmlib/util/noise/NativeBillowLoader*.class',
+    'art/arcane/volmlib/util/noise/BillowBatch*.class',
+    'art/arcane/volmlib/util/noise/NativeNoiseLibrary*.class',
+    'art/arcane/volmlib/util/noise/program/NativeNoise*.class',
+    'art/arcane/volmlib/util/noise/program/NativeProgramEncoder*.class',
+    'art/arcane/volmlib/util/noise/program/GpuNoise*.class',
+    'art/arcane/volmlib/native/**'
+]