Add egg logic and hatching screen (WiP) and end biome arena BG

src/ui/egg-hatch-scene-handler.ts

@@ -0,0 +1,41 @@
+import BattleScene, { Button } from "../battle-scene";
+import { Mode } from "./ui";
+import UiHandler from "./uiHandler";
+
+export default class EggHatchSceneHandler extends UiHandler {
+    public eggHatchContainer: Phaser.GameObjects.Container;
+
+    constructor(scene: BattleScene) {
+      super(scene, Mode.EGG_HATCH_SCENE);
+    }
+  
+    setup() {
+      this.eggHatchContainer = this.scene.add.container(0, -this.scene.game.canvas.height / 6);
+      this.scene.fieldUI.add(this.eggHatchContainer);
+
+      const eggLightraysAnimFrames = this.scene.anims.generateFrameNames('egg_lightrays', { start: 0, end: 3 });
+      this.scene.anims.create({
+        key: 'egg_lightrays',
+        frames: eggLightraysAnimFrames,
+        frameRate: 32
+      });
+    }
+
+    show(_args: any[]): void {
+      super.show(_args);
+      
+      this.scene.fieldUI.bringToTop(this.eggHatchContainer);
+    }
+  
+    processInput(button: Button): boolean {
+      return this.scene.ui.getMessageHandler().processInput(button);
+    }
+  
+    setCursor(_cursor: integer): boolean {
+      return false;
+    }
+
+    clear() {
+      this.eggHatchContainer.removeAll(true);
+    }
+  }