refactor(i18n): 扁平化多语言文件结构，移除嵌套的components对象

统一调整所有组件级多语言配置，将原有的components.[componentName]嵌套结构改为直接顶层键值对，简化语言包的调用层级

lang/en-us/components/ns-goods-sku.js

@@ -1,9 +1,5 @@
 export const lang = {
 	// ns-goods-sku product SKU component
-	components: {
-		nsGoodsSku: {
-			// Point suffix: {point} is the points amount placeholder
-			pointSuffix: '{point} points',
-		},
-	},
+	// Point suffix: {point} is the points amount placeholder
+	pointSuffix: '{point} points',
 }