[Update] Plugins: Add localization system.

src-ui/plugins/dev_plugin_subtitles/locales/initI18n.js

@@ -0,0 +1,14 @@
+import en from "./en.yml";
+import ja from "./ja.yml";
+import plugin_info from "../plugin_info.json";
+
+export const initI18n = (i18n) => {
+    const ns = plugin_info.plugin_id;
+    // parse once
+    const en_res = en;
+    const ja_res = ja;
+
+    // addResourceBundle will merge into i18n’s store
+    i18n.addResourceBundle("en", ns, en_res, /* deep = */ true, /* overwrite = */ true);
+    i18n.addResourceBundle("ja", ns, ja_res, /* deep = */ true, /* overwrite = */ true);
+};