Add internationalization support for exception messages

[konard]

🌍 Internationalization Support for Exception Messages

This pull request implements comprehensive internationalization (i18n) support for exception messages in the Platform.Exceptions library, resolving issue #17.

📋 Changes Made

🗂️ Resource Files

• Resources.resx: English (default) resource file with exception message templates
• Resources.ru.resx: Russian translation of all exception messages
• Resources.Designer.cs: Strongly-typed resource accessor class for compile-time safety

🔧 Code Updates

• EnsureExtensions.cs: Replaced hardcoded strings with resource references:
  • $"Argument {argumentName} is null." → string.Format(Resources.ArgumentIsNull, argumentName)
  • $"Argument {argumentName} does not meet the criteria." → string.Format(Resources.ArgumentDoesNotMeetCriteria, argumentName)
• ExceptionExtensions.cs: Localized exception formatting strings:
  • "Unable to format exception." → Resources.UnableToFormatException
  • "Inner exception: " → Resources.InnerException
• Platform.Exceptions.csproj: Updated project configuration for resource generation

🧪 Testing

• InternationalizationTests.cs: Comprehensive test suite validating:
  • English/Russian localization for ArgumentNullException messages
  • English/Russian localization for ArgumentException messages
  • Exception formatting localization

🚀 Features

Supported Languages

• English (default/fallback)
• Russian (ru-RU culture)

Localized Messages

• Argument null exception messages
• Argument criteria validation messages
• Exception formatting text
• Inner exception labels

📊 Test Results

All tests pass successfully:

Passed!  - Failed:     0, Passed:     5, Skipped:     0, Total:     5

🔄 Version Updates

• Version: Updated to 0.6.0
• Release Notes: "Added internationalization support for exception messages. Supports English and Russian languages."

💡 Usage Example

// Will show localized messages based on current thread's UI culture
Ensure.Always.ArgumentNotNull(null, "testParam");

// English: "Argument testParam is null."
// Russian: "Аргумент testParam равен null."

📝 Notes

• Uses standard .NET resource localization patterns
• Thread-safe resource access
• Fallback to English if translation not available
• Maintains backward compatibility

Fixes #17

🤖 Generated with Claude Code