Add Cyrillic range to fonts (#27)

* Enhance TOC parsing and chapter selection logic

- Update .gitignore to include additional paths
- Refactor Epub::parseContentOpf to improve NCX item retrieval
- Modify ContentOpfParser to store media type in ManifestItem
- Implement rebuildVisibleSpineIndices in EpubReaderChapterSelectionScreen for better chapter navigation
- Adjust rendering logic to handle empty chapter lists gracefully

* Refactor TOC parsing logic to streamline cover image and NCX item retrieval

* add cyrillic ranges

* revert

* clang format fix

lib/EpdFont/scripts/fontconvert.py

@@ -54,7 +54,7 @@ intervals = [
     # (0x0370, 0x03FF),
     ### Cyrillic ###
     # Russian, Ukrainian, Bulgarian, etc.
-    # (0x0400, 0x04FF),
+    (0x0400, 0x04FF),
     ### Math Symbols (common subset) ###
     # General math operators
     (0x2200, 0x22FF),