Set descriptive document titles

Document titles represent the pages, for example in lists
with bookmarks. They are important for navigation and
orientation in websites. If the offer or the content of the
page is not labeled, orientation is impaired.

This changes the behavior for setting document titles.
The functionality has been removed from the Page and
Title components and is now represented by `useDocumentTitle`
hook to better describe the content of inividual pages.

Co-authored-by: Anna Vetcininova<anna.vetcininova@cloudogu.com>

scm-ui/ui-extensions/src/extensionPoints.tsx

@@ -257,6 +257,11 @@ export type RepositoryOverviewListOptionsExtensionPoint = ExtensionPointDefiniti
   () => { pageSize?: number; showArchived?: boolean }
 >;
 
+export type DocumentTitleExtensionPoint = ExtensionPointDefinition<
+  "document.title",
+  { documentTitle: string | ((originalTitle: string) => string) }
+>;
+
 // From docs
 
 export type AdminNavigation = RenderableExtensionPointDefinition<"admin.navigation", { links: Links; url: string }>;