As investigated in T214917, we want to extract a simple SummaryFormatter and AutoCommentFormatter into an external library.
This library should be independent from Wikibase and be reusable by other MediaWiki extensions that do not have a connection to or similarity with Wikibase.
- create gerrit repository
- start security review
- start packagist deployment
- extract library from Wikibase and have Wikibase depend on that library