Add 9 new string utility functions (#11)

* new functionality

* chore: update version to 0.4.0 and enhance CHANGELOG

Author: Zheruel

CHANGELOG.md

@@ -7,9 +7,31 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.0] - 2025-09-03
+
+### Added
+
+- `excerpt` - Create smart text excerpts with word boundary awareness
+- `highlight` - Highlight search terms in text with customizable wrappers
+- `diff` - Compute simple string diffs showing additions and deletions
+- `levenshtein` - Calculate edit distance between strings with early termination
+- `levenshteinNormalized` - Normalized Levenshtein similarity score (0-1)
+- `fuzzyMatch` - Sublime Text-style fuzzy string matching for command palettes
+- `pluralize` - Convert singular words to plural with English grammar rules
+- `singularize` - Convert plural words to singular with irregular forms support
+
+### Enhanced
+
+- Support for complex fuzzy matching with scoring algorithms
+- Optimized Levenshtein implementation with O(min(m,n)) space complexity
+- Smart excerpt generation with punctuation handling
+- Configurable highlighting with HTML escaping and word boundary options
+- Comprehensive pluralization rules including irregular forms
+
 ## [0.3.0] - 2025-09-03
 
 ### Added
+
 - `codePoints` - Convert strings into arrays of Unicode code points
 - `graphemes` - Split strings into grapheme clusters (emoji-aware)
 - `isASCII` - Check if string contains only ASCII characters
@@ -18,6 +40,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `removeNonPrintable` - Remove control and formatting characters
 
 ### Enhanced
+
 - Comprehensive Unicode support across all new utilities
 - Support for complex emoji sequences and combining characters
 - Configurable options for whitespace normalization and character removal
@@ -27,6 +50,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [0.2.0] - 2025-09-02
 
 ### Added
+
 - `template` - String interpolation with variables and nested object support
 - `templateSafe` - HTML-escaped version of template for safe rendering
 - `pad` - Pad string on both sides to target length
@@ -42,6 +66,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [0.1.0] - 2025-09-01
 
 ### Added
+
 - Initial release with 15 essential string utilities
 - `slugify` - Convert strings to URL-safe slugs
 - `truncate` - Truncate strings with ellipsis
@@ -66,12 +91,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Detailed JSDoc documentation for all functions
 
 ### Technical Details
+
 - Built with TypeScript 5.9
 - Supports Node.js 18+
 - Bundle size < 1KB (minified + gzipped)
 - 100% test coverage for utility functions
 - Modern build tooling with tsup and Vitest
 
+[0.4.0]: https://github.com/Zheruel/nano-string-utils/releases/tag/v0.4.0
 [0.3.0]: https://github.com/Zheruel/nano-string-utils/releases/tag/v0.3.0
 [0.2.0]: https://github.com/Zheruel/nano-string-utils/releases/tag/v0.2.0
-[0.1.0]: https://github.com/Zheruel/nano-string-utils/releases/tag/v0.1.0
+[0.1.0]: https://github.com/Zheruel/nano-string-utils/releases/tag/v0.1.0