[gharlan]

Second step of the remaining structure/media pool extension point cleanup (after #6784): the extension points carrying data (deletion, permissions, status types, rendering, URLs, queries) become typed classes.

old	new	subject / carries
ART_PRE_DELETED	Content\ExtensionPoint\ArticleDeleting	readonly; $article (slices still exist)
ART_IS_PERMITTED	Content\ExtensionPoint\ArticlePermissionCheck	bool; $article
CAT_IS_PERMITTED	Content\ExtensionPoint\CategoryPermissionCheck	bool; $category
MEDIA_IS_PERMITTED	MediaPool\ExtensionPoint\MediaPermissionCheck	bool; $media
ART_STATUS_TYPES, CAT_STATUS_TYPES	Content\ExtensionPoint\ArticleStatusTypes	list of status types
ART_CONTENT	Content\ExtensionPoint\ArticleContentOutput	output; $content, $contentSectionId
ART_INIT	Content\ExtensionPoint\ArticleContentRendering	readonly; $content
ART_SLICES_QUERY	Content\ExtensionPoint\ArticleSlicesQuery	query; $content
URL_REWRITE	Content\ExtensionPoint\ArticleUrl	?string (null = default URL); $articleId, $languageId, $params
MEDIA_URL_REWRITE	MediaPool\ExtensionPoint\MediaUrl	?string (null = default URL); $media
MEDIA_LIST_QUERY	MediaPool\ExtensionPoint\MediaListQuery	query; modifiable $params, $count
MEDIA_MANAGER_URL	MediaManager\ExtensionPoint\MediaManagerUrl	URL; $type, $fileName, $buster

Status types merged

The status of a category is stored as the status of its start article, yet there were two lists of status types with separate extension points. An addon extending only one of them (accessdenied registers the same listener for both) would let them diverge. Now there is one list: ArticleStatusTypes replaces both points, and CategoryHandler::statusTypes()/nextStatus()/prevStatus() are removed in favor of the ArticleHandler methods (rector rules included).

Further changes

• ArticleUrl/MediaUrl use null instead of '' for "keep the default URL".
• MediaListQuery provides the query parameters as a modifiable property instead of a reference in the params, and $count tells the count query of a paginated list apart. As before, the data query already contains ORDER BY/LIMIT when it is dispatched.
• The history/working version listeners in boot/frontend.php use the typed points; their comments claiming that the article id is unknown in ART_INIT were outdated and are corrected.
• Media::isPermitted() no longer needs its return.tooWideBool ignore; the psalm baseline shrinks.
• Rector rules map all old names.

Tests

New MediaHandlerTest::testMediaListQueryCanBeExtended (count and data query, params). Smoke-tested structure page, media pool list/search, content editor and frontend.