Update to V2.0

Release v2.0: Subnet Calculator, Enhanced User Experience and Bug Fixes

This release adds a comprehensive subnet calculator and improved visual feedback.

🚀 NEW FEATURES:
- Subnet Calculator with comprehensive network analysis tools
  • CIDR and subnet mask conversion (e.g., /24 ↔ 255.255.255.0)
  • Network, broadcast, and usable IP range calculations
  • Binary representation of IP addresses and subnet masks
  • Network class identification (A/B/C/D/E)
  • Private vs. public IP detection
  • Subnetting recommendations and guidance
  • Interactive mode for quick calculations

✨ ENHANCEMENTS:
- Loading animation with multi-step progress indicators
- Enhanced script header with detailed credits and documentation
- Improved user experience with visual feedback during operations

Bug fixes:
- Script no longer restarts the network adapter (important for Wi-Fi adapters)
- Removed redundant messages
- Squashed some other bugs

🛠️ IMPROVEMENTS:
- Better code organization and maintainability
- Enhanced documentation and inline comments
- Script expanded from 1,446 to 1,820 lines with new functionality

🔧 TECHNICAL:
- Script size: 1,820 lines
- PowerShell 5.1+ compatible
- Fully backward compatible with v1.9 configurations

Breaking Changes: None

Credits: Subnet Calculator inspired by PowerShell community implementations (robert-gaines, Jzubia, and others)

Author: Dantdmnl