[add] i18n support zh,en

api/app/locales/en/README.md

@@ -0,0 +1,26 @@
+# English Translation Files
+
+This directory contains English translation files.
+
+## File Structure
+
+- `common.json` - Common translations (success messages, actions, validation)
+- `auth.json` - Authentication module translations
+- `workspace.json` - Workspace module translations
+- `tenant.json` - Tenant module translations
+- `errors.json` - Error message translations
+- `enums.json` - Enum value translations
+
+## Translation File Format
+
+All translation files use JSON format and support nested structures.
+
+Example:
+```json
+{
+  "success": {
+    "created": "Created successfully",
+    "updated": "Updated successfully"
+  }
+}
+```