The TranslationAliasesDirs configuration allows defining translatable
aliases in JSON files. The value should be a name or names of folders
that contains files that have localized aliases. Each language should
have a separate file.
Currently, it supports defining special page aliases but in the
future can be extended to support magic words and namespace aliases.
The patch adds a script: ConvertExtensionsMessagesToTranslationAlias
that can be used to convert existing ExtensionMessagesFiles to the new
format.
Bug: T89947
Change-Id: Ief16a48a8dc8742854f67301791aa2a0b0531116