feat(i18n): standardize bilingual catalogs and tooling

packages/lexical/src/locales/catalogs.test.ts

@@ -1,16 +1,19 @@
 import { describe, expect, it } from "vitest"
 
 import { lexicalMessages } from "../messages"
-import { messages as en } from "./en"
+import { messages as enUS } from "./en-US"
 import { messages as zhHans } from "./zh-Hans"
 
 describe("Lexical locale catalogs", () => {
   it("ships every built-in message in every locale", () => {
-    const messageIds = Object.values(lexicalMessages)
-      .map((descriptor) => descriptor.id)
-      .sort()
+    const messageIds = Object.values(lexicalMessages).map(
+      (descriptor) => descriptor.id
+    )
+    messageIds.sort()
 
-    for (const messages of [en, zhHans]) {
+    for (const messages of [enUS, zhHans]) {
+      // Object.keys returns a fresh array.
+      // oxlint-disable-next-line unicorn/no-array-sort
       expect(Object.keys(messages).sort()).toEqual(messageIds)
     }
   })

packages/lexical/src/locales/catalogs.ts

@@ -1,6 +1,6 @@
 import type { lexicalMessages } from "../messages"
 
-export const lexicalCatalogLocales = ["en", "zh-Hans"] as const
+export const lexicalCatalogLocales = ["en-US", "zh-Hans"] as const
 
 type LexicalMessageId =
   (typeof lexicalMessages)[keyof typeof lexicalMessages]["id"]

packages/lexical/src/locales/en-US.ts

@@ -1,6 +1,6 @@
 import type { LexicalMessageCatalog } from "./catalogs"
 
-export const locale = "en"
+export const locale = "en-US"
 export const languageTag = "en-US"
 
 export const messages = {