Fixed a mistake when adding languages

[yuu1111]

• Japanese was not added to verifyLang() in `utils.ts

• Add break; to SettingsDisplayUiHandler() in settings-display-ui-handler.ts, because it was missing in the Switch statement (fix for the problem that Language in the settings screen was still displayed in English)

• I should also add Japanese processing to battle-stat.test.ts, but I don't know what it does, so I haven't made any changes this time.

Machine translation from Japanese to English.

[OrangeRed]

こんばんは、

最後の人 @Chepyu がどこに行ったわからないんですが、あの方のフォークをコピーして新しい PRを作りました。

できれば @yuu1111 が今までしたことを俺のフォークで移動してくれませんか？

[MrWaterT]

Suggested change

	case "ja":
	return true;
	default:
	return true;
	case "ja":
	default:

verifylang() needs public/images/types_ja.png and types_ja.json.
Setting return value to false is now better, until type images are added.

[MrWaterT]

+ battle-stat.test.ts is for npm test, checking locales/ja/pokemon-info.ts and locale/ja/battle.ts.