CommentParser:
* Move comment formatting backend from Linker to a CommentParser service.
Allow link existence and file existence to be batched.
* Rename $local to $samePage since I think that is clearer.
* Rename $title to $selfLinkTarget since it was unclear what the title
was used for.
* Rename the "autocomment" concept to "section link" in public
interfaces, although the old term remains in CSS classes.
* Keep unsafe HTML pass-through in separate "unsafe" methods, for easier
static analysis and code review.
CommentFormatter:
* Add CommentFormatter and RowCommentFormatter services as a usable
frontend for comment batches, and to replace the Linker static methods.
* Provide fluent and parametric interfaces.
Linker:
* Remove Linker::makeCommentLink() without deprecation -- nothing calls
it and it is obviously an internal helper.
* Soft-deprecate Linker methods formatComment(), formatLinksInComment(),
commentBlock() and revComment().
Caller migration:
* CommentFormatter single: Linker, RollbackAction, ApiComparePages,
ApiParse
* CommentFormatter parametric batch: ImageHistoryPseudoPager
* CommentFormatter fluent batch: ApiQueryFilearchive
* RowCommentFormatter sequential: History feed, BlocklistPager,
ProtectedPagesPager, ApiQueryProtectedTitles
* RowCommentFormatter with index: ChangesFeed, ChangesList,
ApiQueryDeletedrevs, ApiQueryLogEvents, ApiQueryRecentChanges
* RevisionCommentBatch: HistoryPager, ContribsPager
Bug: T285917
Change-Id: Ia3fd50a4a13138ba5003d884962da24746d562d0
