string_utils_plus 0.0.1

A comprehensive and modern Dart string manipulation library using extension methods.

0.0.1

**What’s new in this version:**
- Casing and conversion methods:
    - camelToSnake(), snakeToCamel(), kebabToPascal(), pascalToKebab()
    - titleCase(), capitalize(), decapitalize()
- Formatting utilities:
    - slugify(), truncate(), removeSpecialChars()
    - padLeftWith(), padRightWith(), mask(), normalizeWhitespace()
- Counting and searching:
    - containsWord(), wordCount(), charCount()
- Validation and checking:
    - isUpperCase(), isLowerCase(), isNumeric()
    - equalsIgnoreCase(), equalsTrimmed()
    - isValidEmail(), isValidUrl(), isValidDomain()
    - isValidIPv4(), isValidIPv6(), isValidPhoneNumber()
    - isStrongPassword(), matchesRegex()
- Pluralization:
    - pluralize(), singularize()
- Full null safety and modular structure for clean extensibility
- Comprehensive inline documentation and unit tests covering all methods
- Performance improvements and codebase refinements