Tweak library view (#8240)

- Move category join to improve performance
- Move bookmark calculation into query
- Move unread calculation into domain

app/src/main/java/eu/kanade/domain/library/model/LibraryManga.kt

@@ -5,15 +5,20 @@ import eu.kanade.domain.manga.model.Manga
 data class LibraryManga(
     val manga: Manga,
     val category: Long,
-    val unreadCount: Long,
+    val totalChapters: Long,
     val readCount: Long,
+    val bookmarkCount: Long,
     val latestUpload: Long,
     val chapterFetchedAt: Long,
     val lastRead: Long,
 ) {
     val id: Long = manga.id
 
-    val totalChapters = readCount + unreadCount
+    val unreadCount
+        get() = totalChapters - readCount
+
+    val hasBookmarks
+        get() = bookmarkCount > 0
 
     val hasStarted = readCount > 0
 }