Fixed dev UI preview (#10385)

The TachiyomiTheme introduced a dependency-injection construct that didn't
 exist at the time of rendering previews, so I've changed the preview function
 to use a preview version of the theme that uses declarative configuration
 over dependency injection

app/src/main/java/eu/kanade/presentation/reader/components/ModeSelectionDialog.kt

@@ -19,7 +19,7 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.tooling.preview.PreviewLightDark
 import androidx.compose.ui.unit.dp
-import eu.kanade.presentation.theme.TachiyomiTheme
+import eu.kanade.presentation.theme.TachiyomiPreviewTheme
 import tachiyomi.i18n.MR
 import tachiyomi.presentation.core.components.SettingsItemsPaddings
 import tachiyomi.presentation.core.components.material.padding
@@ -70,7 +70,7 @@ fun ModeSelectionDialog(
 @PreviewLightDark
 @Composable
 private fun Preview() {
-    TachiyomiTheme {
+    TachiyomiPreviewTheme {
         Surface {
             Column {
                 ModeSelectionDialog(