* Follow page status via StateFlow
Keep getPage subscription since it's needed to load the pages
* Replace PageLoader.getPage with PageLoader.loadPage
(cherry picked from commit 2ef1f07aaea0852c13a4eb4096ac96c8aa507c39)
# Conflicts:
# app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/HttpPageLoader.kt
# app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerPageHolder.kt