v1.4.1

# What’s New in v1.4.1

This release focuses on bug fixes and refactoring for more robust Persian text processing in Shekar.

## Highlights

- **Fixed Sentence Tokenizer Bug** – handles Persian quotations and multi-sentence structures correctly.  
- **Fixed Spellchecker Bug** – improved accuracy and stability.  
- **Refactored Spacing Normalizer** – split into four well-defined modules:  
  - `OrthographicSpacingNormalizer`  
  - `PunctuationSpacingNormalizer`  
  - `WordSpacingNormalizer`  
  - `VerbalSpacingNormalizer`  
  Enhances clarity, maintainability, and modularity of preprocessing pipelines.