[libgdx] Remove dependency on gdx-lwjgl3-glfw-awt-macos in SkeletonVi…

…ewer, use LWJGL glfw_async instead

Same deficiency: when resizing, it will eventually crash with

```
UNSUPPORTED (log once): setPrimitiveRestartEnabled:index: unsupported!
-[AGXG13XFamilyCommandBuffer renderCommandEncoderWithDescriptor:]:888: failed assertion `A command encoder is already encoding to this command buffer'
```

Not sure how to work around this. JGLFW does not have this issue.

spine-libgdx/build.gradle

@@ -13,7 +13,6 @@ allprojects {
         mavenCentral()
     }
 
-    // Set Java 8 compatibility using JDK 17
     tasks.withType(JavaCompile).configureEach {
         sourceCompatibility = '1.7'
         targetCompatibility = '1.7'
@@ -43,11 +42,19 @@ project("spine-skeletonviewer") {
         from {
             configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
         }
-    }
 
-    tasks.named('jar').configure {
         dependsOn(project(":spine-libgdx").tasks.named('jar'))
     }
+
+    tasks.named('build').configure {
+        dependsOn(tasks.named('jar'))
+    }
+
+    tasks.withType(JavaCompile).configureEach {
+        sourceCompatibility = '1.8'
+        targetCompatibility = '1.8'
+        options.release.set(8)  // Ensures Java 8 bytecode is produced
+    }
 }
 
 configure(subprojects - project("spine-libgdx")) {
@@ -58,7 +65,6 @@ configure(subprojects - project("spine-libgdx")) {
         implementation "com.badlogicgames.gdx:gdx:$libgdxVersion"
         implementation "com.badlogicgames.gdx:gdx-platform:$libgdxVersion:natives-desktop"
         implementation "com.badlogicgames.gdx:gdx-backend-lwjgl3:$libgdxVersion"
-        implementation "com.badlogicgames.gdx:gdx-lwjgl3-glfw-awt-macos:$libgdxVersion"
         implementation "com.badlogicgames.gdx:gdx-box2d:$libgdxVersion"
         implementation "com.badlogicgames.gdx:gdx-box2d-platform:$libgdxVersion:natives-desktop"
     }

spine-libgdx/spine-skeletonviewer/src/com/esotericsoftware/spine/SkeletonViewer.java

@@ -54,6 +54,7 @@
 import com.esotericsoftware.spine.AnimationState.TrackEntry;
 import com.esotericsoftware.spine.Skeleton.Physics;
 import com.esotericsoftware.spine.utils.TwoColorPolygonBatch;
+import org.lwjgl.system.Configuration;
 
 import java.awt.Toolkit;
 
@@ -377,6 +378,8 @@ static public void main (String[] args) throws Exception {
 		float dpiScale = 1;
 		if (os.contains("Windows")) dpiScale = Toolkit.getDefaultToolkit().getScreenResolution() / 96f;
 		if (os.contains("OS X")) {
+			Configuration.GLFW_CHECK_THREAD0.set(false);
+			Configuration.GLFW_LIBRARY_NAME.set("glfw_async");
 			Object object = Toolkit.getDefaultToolkit().getDesktopProperty("apple.awt.contentScaleFactor");
 			if (object instanceof Float && ((Float)object).intValue() >= 2) dpiScale = 2;
 		}