Category watch state (#7109)

* feat: wip, category watch change

* feat: pass data to client

* feat: allow changing state

* fix: account page categories

* fix: show in unread if topic is followed or category is watched

* feat: add default watch state to acp

* feat: save user category watch state

* feat: update unread recent pages

* fix: remove dupe code

* fix: flip conditions

* fix: handle empty arrays

* fix: ignore/watch on others profile

* feat: upgrade script for category states

if there are any users ignoring categories set their state in new zset and delete cid:<cid>:ignorers

* fix: upgrade

* fix: tests

* fix: redis count

* fix: more tests

src/categories/delete.js

@@ -52,7 +52,7 @@ module.exports = function (Categories) {
 					'cid:' + cid + ':tids:posts',
 					'cid:' + cid + ':pids',
 					'cid:' + cid + ':read_by_uid',
-					'cid:' + cid + ':ignorers',
+					'cid:' + cid + ':uid:watch:state',
 					'cid:' + cid + ':children',
 					'cid:' + cid + ':tag:whitelist',
 					'category:' + cid,