Multilingual plugin definition

[CBones]

Automatically create multi-lingual indices if IndexDefinition instance is provided and multilingual = {} property is set in index plugin definition.

Options:

multilingual = {
  "index_pattern" = "{indexName}-{langcode}",
  "exclude" = {"de", "fr"}
 
}

By default index pattern is {indexName}-{langcode} but it can be overridden with the option.
Option exclude excludes given languages.