Update final boss fight and restructure some files

src/ui/biome-select-ui-handler.ts

@@ -1,5 +1,6 @@
 import BattleScene, { Button } from "../battle-scene";
-import { Biome, biomeLinks, getBiomeName } from "../data/biome";
+import { biomeLinks, getBiomeName } from "../data/biomes";
+import { Biome } from "../data/enums/biome";
 import { addTextObject, TextStyle } from "./text";
 import { Mode } from "./ui";
 import UiHandler from "./ui-handler";