feat(projects): import i18n [引入i18n]

src/locales/i18n.ts

@@ -0,0 +1,22 @@
+import type { App } from 'vue';
+import { createI18n } from 'vue-i18n';
+import messages from './lang';
+import type { LocaleKey } from './lang';
+
+const i18n = createI18n({
+  locale: 'zh-CN',
+  fallbackLocale: 'en',
+  messages
+});
+
+export function setupI18n(app: App) {
+  app.use(i18n);
+}
+
+export function t(key: string) {
+  return i18n.global.t(key);
+}
+
+export function setLocale(locale: LocaleKey) {
+  i18n.global.locale = locale;
+}