Add option to skip downloading duplicate read chapters (#1125)

* Add query to get chapter count by manga and chapter number

* Add functions to get chapter count by manga and chapter number

* Only count read chapters

* Add interactor

* Savepoint

* Extract new chapter logic to separate function

* Update javadocs

* Add preference to toggle new functionality

* Add todo

* Add debug logcat

* Use string resource instead of hardcoding title

* Add temporary logcat for debugging

* Fix detekt issues

* Update javadocs

* Update download unread chapters preference

* Remove debug logcat calls

* Update javadocs

* Resolve issue where read chapters were still being downloaded during manual manga fetch

* Apply code review changes

* Apply code review changes

* Revert "Apply code review changes"

This reverts commit 1a2dce78acc66a7c529ce5b572bdaf94804b1a30.

* Revert "Apply code review changes"

This reverts commit ac2a77829313967ad39ce3cb0c0231083b9d640d.

* Group download chapter logic inside the interactor GetChaptersToDownload

* Update javadocs

* Apply code review

* Apply code review

* Apply code review

* Update CHANGELOG.md to include the new feature

* Run spotless

* Update domain/src/main/java/mihon/domain/chapter/interactor/FilterChaptersForDownload.kt

---------

Co-authored-by: AntsyLich <59261191+AntsyLich@users.noreply.github.com>
(cherry picked from commit ca968f162ef7a61a9036b7ab9bea407a6334801d)

# Conflicts:
#	CHANGELOG.md
#	app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateJob.kt
#	app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaScreenModel.kt

app/src/main/java/eu/kanade/presentation/more/settings/screen/SettingsDownloadScreen.kt

@@ -120,6 +120,7 @@ object SettingsDownloadScreen : SearchableSettings {
         allCategories: List<Category>,
     ): Preference.PreferenceGroup {
         val downloadNewChaptersPref = downloadPreferences.downloadNewChapters()
+        val downloadNewUnreadChaptersOnlyPref = downloadPreferences.downloadNewUnreadChaptersOnly()
         val downloadNewChapterCategoriesPref = downloadPreferences.downloadNewChapterCategories()
         val downloadNewChapterCategoriesExcludePref = downloadPreferences.downloadNewChapterCategoriesExclude()
 
@@ -152,6 +153,11 @@ object SettingsDownloadScreen : SearchableSettings {
                     pref = downloadNewChaptersPref,
                     title = stringResource(MR.strings.pref_download_new),
                 ),
+                Preference.PreferenceItem.SwitchPreference(
+                    pref = downloadNewUnreadChaptersOnlyPref,
+                    title = stringResource(MR.strings.pref_download_new_unread_chapters_only),
+                    enabled = downloadNewChapters,
+                ),
                 Preference.PreferenceItem.TextPreference(
                     title = stringResource(MR.strings.categories),
                     subtitle = getCategoriesLabel(