Txt file fix (#35)

* Fixed virtualization data indexing and improved text file to EPUB conversion logic.

- Corrected array indexing for `chunksData` and `chunkHeights` in `epub_reader.js` to prevent overwriting entire arrays.
- Refined virtualization intersection observer to properly restore and unload chunk content using index-based caching.
- Updated `SingleFileImporter.kt` to convert plain text into structured HTML paragraphs instead of a single `pre` tag.
- Enhanced CSS styles for imported single-file documents and added HTML entity escaping.

* Adjusted text layout and enhanced pagination mismatch logging

*   Configured `PlatformTextStyle` and `LineHeightStyle` to improve text measurement consistency.
*   Updated `checkLayoutMismatch` to include text snippets and handle zero expected height.
*   Refined `Modifier` application order in the reader view.
*   Ensured `maxHeight` is set to `Infinity` during text measurement in `Paginator`.

app/build.gradle.kts

@@ -20,6 +20,7 @@ if (localPropertiesFile.exists()) {
 android {
     namespace = "com.aryan.reader"
     compileSdk = 35
+    ndkVersion = "29.0.14206865"
 
     defaultConfig {
         applicationId = "com.aryan.reader"