Lists: made on /lists, read as a tab of the feed

A persona's lists (PrivaPub's /api/v1/lists): made, renamed, given a
replies policy and made exclusive on /lists, filled from the accounts it
follows (accounts/search?following=true), and read as the feed's Lists tab.
A followed account's profile has a Lists menu to put it in or take it out.
ListService does the calls; the e2e tests check each step against
PrivaPub's own answer.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

Extensions/GenericExtensions.cs

@@ -92,6 +92,7 @@ public static class GenericExtensions
 		TimelineType.Favourites => "ion-md-heart",
 		TimelineType.Bookmarks => "ion-md-bookmark",
 		TimelineType.Tag => "ion-md-pricetag",
+		TimelineType.Lists => "ion-md-list",
 		_ => default
 	};