chore: add chroot container support and refactor tokenizer variable naming

- Add CHANGELOG entry for version 0.5.0 documenting new chroot container feature
- Rename ambiguous variables in tokenizer.py (word→current_word, word_start→word_start_position, etc.)
- Standardize string quotes from single to double in argparse arguments
- Normalize whitespace in comments and remove trailing spaces

CHANGELOG.md

@@ -5,6 +5,14 @@
 
 
 
+
+## Version 0.5.0 - 2025-11-05
+
+Users can now run the application inside a chroot container. Developers can use the new `chroot.py` script to initialize and enter these containers.
+
+**Changes:** 2 files, 118 lines
+**Languages:** Markdown (8 lines), Python (110 lines)
+
 ## Version 0.4.0 - 2025-11-05
 
 Testing has been added to verify the HTTP functionality. This improves the reliability and quality of the HTTP features.