Add "Trending posts" (statuses) feed (#4007)

Add "Trending posts" (statuses) feed.

This feed is a good source of interesting accounts to follow and,
personally, a sort of "Front page of the Fediverse".

Since #3908 and #3910 (which would provide a more thorough, albeit
complex, access to trending things) won't get merged, I'd like to
address this missing feed by simply adding another tab/feed.

~~If desired, I can move the second commit (fixing lint) to another
PR.~~

## Screenshots
### Tab
<img
src="https://github.com/tuskyapp/Tusky/assets/1063155/6a71a97e-673e-44c7-b67d-9b1df0bed4f5"
width=320 /> <img
src="https://github.com/tuskyapp/Tusky/assets/1063155/9bf60b23-d2f3-4dd8-8af6-e96647b02121"
width=320 />

### Activity
<img
src="https://github.com/tuskyapp/Tusky/assets/1063155/4e07dea3-d97f-42c6-8551-492a3116fcfa"
width=320 /> <img
src="https://github.com/tuskyapp/Tusky/assets/1063155/ad00a134-d622-43f4-8305-84cfa7fed706"
width=320 />

app/src/main/java/com/keylesspalace/tusky/TabData.kt

@@ -34,6 +34,7 @@ const val LOCAL = "Local"
 const val FEDERATED = "Federated"
 const val DIRECT = "Direct"
 const val TRENDING_TAGS = "TrendingTags"
+const val TRENDING_STATUSES = "TrendingStatuses"
 const val HASHTAG = "Hashtag"
 const val LIST = "List"
 const val BOOKMARKS = "Bookmarks"
@@ -99,6 +100,12 @@ fun createTabDataFromId(id: String, arguments: List<String> = emptyList()): TabD
             icon = R.drawable.ic_trending_up_24px,
             fragment = { TrendingTagsFragment.newInstance() }
         )
+        TRENDING_STATUSES -> TabData(
+            id = TRENDING_STATUSES,
+            text = R.string.title_public_trending_statuses,
+            icon = R.drawable.ic_hot_24dp,
+            fragment = { TimelineFragment.newInstance(TimelineViewModel.Kind.PUBLIC_TRENDING_STATUSES) }
+        )
         HASHTAG -> TabData(
             id = HASHTAG,
             text = R.string.hashtags,