routers: able to migrate repo from local path

- modules/middleware/context.go: add HandleAPI method

conf/locale/locale_en-US.ini

@@ -286,6 +286,8 @@ need_auth = Need Authorization
 migrate_type = Migration Type
 migrate_type_helper = This repository will be a <span class="label label-blue label-radius">Mirror</span>
 migrate_repo = Migrate Repository
+migrate.clone_address = Clone Address
+migrate.invalid_local_path = Invalid local path, it does not exist or not a directory.
 
 copy_link = Copy
 click_to_copy = Copy to clipboard