feat(i18n): add getLocale

packages/uni-i18n/dist/uni-i18n.cjs.js

@@ -251,6 +251,9 @@ function initVueI18n(messages, fallbackLocale = 'en', locale) {
         t(key, values) {
             return t(key, values);
         },
+        getLocale() {
+            return i18n.getLocale();
+        },
         setLocale(newLocale) {
             return i18n.setLocale(newLocale);
         },

packages/uni-i18n/dist/uni-i18n.d.ts

@@ -30,6 +30,7 @@ export declare interface I18nOptions {
 
 export declare function initVueI18n(messages: LocaleMessages, fallbackLocale?: BuiltInLocale, locale?: BuiltInLocale): {
     t(key: string, values?: Record<string, unknown> | unknown[] | undefined): string;
+    getLocale(): BuiltInLocale;
     setLocale(newLocale: BuiltInLocale): void;
     mixin: {
         beforeCreate(): void;

packages/uni-i18n/dist/uni-i18n.esm.js

@@ -247,6 +247,9 @@ function initVueI18n(messages, fallbackLocale = 'en', locale) {
         t(key, values) {
             return t(key, values);
         },
+        getLocale() {
+            return i18n.getLocale();
+        },
         setLocale(newLocale) {
             return i18n.setLocale(newLocale);
         },