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

src/data/egg.ts

@@ -0,0 +1,23 @@
+import { ModifierTier } from "../modifier/modifier-type";
+
+export const EGG_SEED = 1073741824;
+
+export enum GachaType {
+  LEGENDARY,
+  TYPE,
+  SHINY
+}
+
+export class Egg {
+  public id: integer;
+  public tier: ModifierTier;
+  public gachaType: GachaType;
+  public timestamp: integer;
+
+  constructor(id: integer, gachaType: GachaType, timestamp: integer) {
+    this.id = id;
+    this.tier = Math.floor(id / EGG_SEED);
+    this.gachaType = gachaType;
+    this.timestamp = timestamp;
+  }
+}