config: add Lithuanian support (#1935)

src/tools/language.ts

@@ -238,6 +238,15 @@ export const languages = [
     locale: 'vi',
     dayJsLocale: 'vi'
   },
+  // Lithuanian
+  {
+    shortName: 'lt',
+    originalName: 'Lietuvių',
+    translatedName: 'Lithuanian',
+    country: 'LT',
+    locale: 'lt',
+    dayJsLocale: 'lt'
+  }
 ] as const satisfies Readonly<Language[]>;
 
 export const getLanguageByCode = (code: string | null): Language =>