Enhance Pluralization Support: Add PluralForms and Rule Implementations

[teogor]

Enhancement: Pluralization Rules and Utility Functions

This pull request introduces new pluralization functionality to the xenoglot-pluralization module. It adds comprehensive support for handling pluralization rules based on quantity and provides utility functions for formatting strings dynamically.

Key Additions:

1. PluralForms Class

   • Implements PluralForms to manage a collection of pluralization rules.
   • Includes methods for retrieving formatted strings based on quantity:
     • getQuantityString(quantity: Int): Retrieves the formatted string for the given quantity, throwing an exception if no rule matches.
     • getQuantityStringOrNull(quantity: Int): Retrieves the formatted string or returns null if no rule matches.
     • getQuantityStringOrElse(quantity: Int, fallback: String): Retrieves the formatted string or returns a fallback value if no rule matches.
     • getQuantityStringOrThrow(quantity: Int): Retrieves the formatted string or throws an exception if no rule matches.

2. PluralizationRule Interface and Implementations

   • Defines the PluralizationRule interface with methods for determining rule matches and providing template strings.
   • Provides implementations for common pluralization rules:
     • ZeroRule, OneRule, TwoRule, FewRule, ManyRule, OtherRule

3. Utility Functions

   • createPluralForms(): Creates an instance of PluralForms using provided templates for different pluralization rules.
   • createPluralizationRules(): Generates a list of PluralizationRule instances from provided templates.
   • PluralizationTemplates Interface: Defines templates for various quantities and converts them into a list of rules.