feat(ui): add Japanese translation from karokaro and Traditional Chinese translation from HYA

Author: oatmealproblem

README.md

@@ -33,6 +33,11 @@ Stylized and customizable Stellaris maps
 
 # Credits
 
+Special thanks to the translators:
+
+- HYA for Traditional Chinese
+- karokaro for Japanese
+
 The app icon is [Orbital](https://game-icons.net/1x1/lorc/orbital.html) by Lorc, licensed under [CC BY 3.0](http://creativecommons.org/licenses/by/3.0/).
 
 Map icons are made by me. Basic shapes are released to the public domain, but others (Wormhole, Gateway, L-Gate, etc) are based on icons from the game Stellaris, and should not be used other than for tools or mods for the game.

src/renderer/src/intl/index.ts

@@ -1,6 +1,8 @@
 import IntlMessageFormat, { type FormatXMLElementFn, type PrimitiveType } from 'intl-messageformat';
 import { derived, writable } from 'svelte/store';
 import enUS from './en-US';
+import jaJP from './ja-JP';
+import zhTW from './zh-TW';
 
 type Paths<T> = T extends object
 	? {
@@ -23,6 +25,8 @@ function flattenMessages(messages: UnflattenedMessages, prefix = ''): Record<str
 
 const locales = {
 	'en-US': flattenMessages(enUS) as Record<MessageID, string>,
+	'ja-JP': flattenMessages(jaJP) as Partial<Record<MessageID, string>>,
+	'zh-TW': flattenMessages(zhTW) as Partial<Record<MessageID, string>>,
 	ENGLISH: Object.fromEntries(
 		Object.entries(flattenMessages(enUS)).map(([k, v]) => [k, v.toUpperCase()]),
 	) as Partial<Record<MessageID, string>>,