chore: move Assets to its own package

app/src/main/java/org/vibecoders/moongazer/managers/Assets.java

@@ -0,0 +1,42 @@
+package org.vibecoders.moongazer.managers;
+
+import org.slf4j.Logger;
+
+import com.badlogic.gdx.assets.AssetManager;
+import com.badlogic.gdx.graphics.Texture;
+
+public class Assets {
+    private static final AssetManager assetManager = new AssetManager();
+    private static final Logger log = org.slf4j.LoggerFactory.getLogger(Assets.class);
+
+    public static <T> T getAsset(String fileName, Class<T> type) {
+        return assetManager.get(fileName, type);
+    }
+
+    /**
+     * Loads assets required for the intro scene only.
+     * 
+     * This is used to load the logo before the main assets are loaded.
+     */
+    public static void loadIntroAndWait() {
+        assetManager.load("icons/logo.png", Texture.class);
+        waitUntilLoaded();
+    }
+
+    public static void loadAll() {
+        log.info("Loading all assets....");
+        log.warn("stub");
+    }
+
+    public static void waitUntilLoaded() {
+        assetManager.finishLoading();
+    }
+
+    public static AssetManager getAssetManager() {
+        return assetManager;
+    }
+
+    public static void dispose() {
+        assetManager.dispose();
+    }
+}