Add Reader Setting to Skip Dupe Chapters (#8831)

Add reader setting to filter dupe chapters with same scanlator priority.

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderViewModel.kt

@@ -183,6 +183,16 @@ class ReaderViewModel(
                 }
             }
             else -> chapters
+        }.run {
+            if (readerPreferences.skipDupe().get()) {
+                groupBy { it.chapterNumber }
+                    .mapValues { (_, chapters) ->
+                        chapters.find { it.id == chapterId || it.scanlator == selectedChapter.scanlator } ?: chapters.first()
+                    }
+                    .values
+            } else {
+                this
+            }
         }
 
         chaptersForReader

app/src/main/java/eu/kanade/tachiyomi/ui/reader/setting/ReaderPreferences.kt

@@ -60,6 +60,8 @@ class ReaderPreferences(
 
     fun skipFiltered() = preferenceStore.getBoolean("skip_filtered", true)
 
+    fun skipDupe() = preferenceStore.getBoolean("skip_dupe", false)
+
     // endregion
 
     // region Split two page spread