feat: major SDK improvements with modern API

[johanviberg]

Summary

This PR introduces significant improvements to the ProxyCheck SDK with a modernized API, enhanced error handling, and better developer experience.

Key Changes

New Features

• Modern Client Architecture: New ProxyCheck class with improved API design
• Enhanced Error Handling: Comprehensive error system with recovery strategies
• Semantic Configuration: Type-safe configuration with validation
• Response Transformation: Utilities for handling and transforming API responses
• Dashboard Service: Access to dashboard statistics and query history
• List Management: Refactored list management with better compatibility

Improvements

• TypeScript: Stronger type safety throughout the codebase
• Testing: Comprehensive test coverage (245 tests)
• Build System: Updated dependencies and configuration
• Examples: Updated all examples to showcase new API features

Fixes

• Fixed linting errors and code complexity issues
• Resolved failing tests
• Updated .gitignore for development files

Breaking Changes

This release includes breaking changes. Users will need to migrate to the new API:

Migration Required

• The main client class has changed from ProxyCheckClient to ProxyCheck
• Configuration options have been restructured
• Response formats have been standardized
• Some method names and signatures have changed

Migration Guide

// Old API
import { ProxyCheckClient } from 'proxycheck-ts';
const client = new ProxyCheckClient({ apiKey: 'your-key' });

// New API
import { ProxyCheck } from 'proxycheck-ts';
const client = new ProxyCheck({ apiKey: 'your-key' });

Please refer to the updated examples and documentation for detailed migration instructions.

Test Results

• All 245 tests passing
• TypeScript compilation successful
• Linting passed
• Build successful

Documentation

• Updated README with new API examples
• Comprehensive inline documentation
• Updated CHANGELOG