Many new modding improvements

core/src/mindustry/mod/ModLoadingMusic.java

@@ -0,0 +1,79 @@
+package mindustry.mod;
+
+import arc.audio.*;
+import arc.mock.*;
+import arc.util.ArcAnnotate.*;
+
+public class ModLoadingMusic implements Music{
+    public @NonNull Music music = new MockMusic();
+
+    @Override
+    public void play(){
+        music.play();
+    }
+
+    @Override
+    public void pause(){
+        music.pause();
+    }
+
+    @Override
+    public void stop(){
+        music.stop();
+    }
+
+    @Override
+    public boolean isPlaying(){
+        return music.isPlaying();
+    }
+
+    @Override
+    public boolean isLooping(){
+        return music.isLooping();
+    }
+
+    @Override
+    public void setLooping(boolean isLooping){
+        music.setLooping(isLooping);
+    }
+
+    @Override
+    public float getVolume(){
+        return music.getVolume();
+    }
+
+    @Override
+    public void setVolume(float volume){
+        music.setVolume(volume);
+    }
+
+    @Override
+    public void setPan(float pan, float volume){
+        music.setPan(pan, volume);
+    }
+
+    @Override
+    public float getPosition(){
+        return music.getPosition();
+    }
+
+    @Override
+    public void setPosition(float position){
+        music.setPosition(position);
+    }
+
+    @Override
+    public void dispose(){
+        music.dispose();
+    }
+
+    @Override
+    public void setCompletionListener(OnCompletionListener listener){
+        music.setCompletionListener(listener);
+    }
+
+    @Override
+    public boolean isDisposed(){
+        return music.isDisposed();
+    }
+}