Add pref to hide pins

src/views/timeline.nim

@@ -91,6 +91,7 @@ proc renderTimelineTweets*(results: Result[Tweet]; prefs: Prefs; path: string):
       var retweets: seq[int]
       for tweet in results.content:
         if tweet.threadId in threads or tweet.id in retweets: continue
+        if tweet.pinned and prefs.hidePins: continue
         let thread = results.content.filterIt(threadFilter(it, tweet.threadId))
         if thread.len < 2:
           if tweet.retweet.isSome: