Added an periodical backup to the telegram bot

app/src/main/kotlin/org/koitharu/kotatsu/core/prefs/AppSettings.kt

@@ -43,6 +43,7 @@ class AppSettings @Inject constructor(@ApplicationContext context: Context) {
 	private val connectivityManager = context.connectivityManager
 	private val preferences: SharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)
 
+
 	var telegramChatId: String?
 		get() = preferences.getString("telegram_chat_id", null)
 		set(value) {

app/src/main/kotlin/org/koitharu/kotatsu/settings/backup/PeriodicalBackupSettingsFragment.kt

@@ -194,3 +194,4 @@ class PeriodicalBackupSettingsFragment : BasePreferenceFragment(R.string.periodi
 		return resolveFile(context)?.path ?: toString()
 	}
 }
+

app/src/main/kotlin/org/koitharu/kotatsu/settings/backup/PeriodicalBackupWorker.kt

@@ -151,4 +151,3 @@ class PeriodicalBackupWorker @AssistedInject constructor(
 		const val DATA_TIMESTAMP = "ts"
 	}
 }
-

app/src/main/res/xml/pref_backup_periodic.xml

@@ -43,5 +43,4 @@
 		android:defaultValue=""
 		android:summary="Enter the chat ID where backups should be sent" />
 
-
 </androidx.preference.PreferenceScreen>