General fixes (#102)

* Improved PDF embedded annotation hit detection logic

* Updated EPUB and PDF reader logic to improve position tracking and TTS stability.

Key changes:
- Refined CFI and locator handling in `EpubReaderScreen` with improved initialization.
- Updated `BookPaginator` to more accurately calculate text offsets in chunks and improve CFI matching logic.
- Modified `TtsPlaybackManager` to insert media items at the correct index, ensuring proper playback order.
- Simplified `EpubReaderTts` page scrolling by removing conditional checks for backward jumps.
- Disabled OCR fallback in `PdfViewerScreen` during text extraction for TTS.

* Updated extractTextWithCfiFromTop to use getBoundingClientRect for identifying the starting block

app/src/main/java/com/aryan/reader/tts/TtsPlaybackManager.kt

@@ -473,7 +473,15 @@ class TtsPlaybackManager(
                             }
 
                             if (!exists) {
-                                player.addMediaItem(nextMediaItem)
+                                var insertPosition = player.mediaItemCount
+                                for (k in 0 until player.mediaItemCount) {
+                                    val id = player.getMediaItemAt(k).mediaId.toIntOrNull() ?: -1
+                                    if (id > targetIndex) {
+                                        insertPosition = k
+                                        break
+                                    }
+                                }
+                                player.addMediaItem(insertPosition, nextMediaItem)
                             }
 
                             if (player.playbackState == Player.STATE_ENDED && player.playWhenReady && targetIndex == player.currentMediaItemIndex + 1) {