feat: v2.2.1 - Anti-Detection Improvements & Performance Optimizations

[lordixir]

Summary

This PR brings significant improvements to the ipmap project including anti-detection features and performance optimizations.

What's New

Added

• Referer Header Rotation: Random referer from Google, Bing, DuckDuckGo for more realistic requests
• Smart Jitter Function: with occasional long pauses (1-3s) for natural patterns
• uTLS Transport: Chrome 131 TLS fingerprint support
• New config constants: DialTimeout, MaxJitterMs
• Unified RNG functions in config: GetRandomInt, GetRandomString, ShuffleStrings

Changed

• Reduced jitter from 100-800ms to 0-200ms for faster scanning
• Reduced timeouts for better performance:
  • TLS handshake: 10s → 5s
  • Response header: 10s → 5s
  • Dial timeout: 10s → 5s
  • Retry backoff: 500ms → 200ms
• ValidateTimeout now uses config.MinTimeout constant

Fixed

• Domain resolution failure with uTLS HTTP/2 compatibility
• Hardcoded timeout values now use config constants

Removed

• ~500 lines of dead code from scanner.go

Testing

• All tests passing (27.1% coverage)
• go vet: No warnings