Add first round of labeling tools (#467)

* Rework notifications to sync locally in full and give users better control

* Fix positioning of load more btn on web

* Improve behavior of load more notifications btn

* Fix to post rendering

* Fix notification fetch abort condition

* Add start of post-hiding by labels

* Create a standard postcontainer and improve show/hide UI on posts

* Add content hiding to expanded post form

* Improve label rendering to give more context to users when appropriate

* Fix rendering bug

* Add user/profile labeling

* Implement content filtering preferences

* Filter notifications by content prefs

* Update test-pds config

* Bump deps

jest/test-pds.ts

@@ -79,6 +79,8 @@ export async function createServer(
     maxSubscriptionBuffer: 200,
     repoBackfillLimitMs: HOUR,
     userInviteInterval: 1,
+    labelerDid: 'did:example:labeler',
+    labelerKeywords: {},
   })
 
   const db =