Use custom QueryPagingSource (#7321)

* Use custom QueryPagingSource

- Adds placeholder to make the list jump around less
- Fixes issue where SQLDelight QueryPagingSource would throw IndexOutOfBounds

* Review Changes

app/src/main/java/eu/kanade/presentation/components/MangaCover.kt

@@ -14,7 +14,7 @@ import coil.compose.AsyncImage
 import eu.kanade.presentation.util.rememberResourceBitmapPainter
 import eu.kanade.tachiyomi.R
 
-enum class MangaCover(private val ratio: Float) {
+enum class MangaCover(val ratio: Float) {
     Square(1f / 1f),
     Book(2f / 3f);