Release v1.6.0: packaging & networking improvements

[anonymouschichvy]

Bump version to 1.6.0 and add PyPI packaging (pyproject.toml + updated setup.py) and a GitHub Actions publish workflow. Remove legacy bin/evillimiter in favor of console_scripts. Improve shell/IO utilities (readline, locate_bin, sudo handling), safer ARP spoofer, faster monitor (raw socket fallback & curses/CLI fallback), IFB-based ingress shaping, conntrack flushing, stealth mode, enhanced host scanning/hostname resolution and OUI lookup, save/load session, analyze export, and a doctor diagnostics command. Various threading, locking and robustness fixes.

[anonymouschichvy]

🎯 Release Highlights

⚡ Traffic Shaping & Network Engine

• IFB Ingress Shaping: Added Intermediate Functional Block (ifb) network device support for precise ingress traffic limiting.
• Conntrack Flushing: Automatic Netfilter connection tracking table flushing when modifying target limits.
• Safer ARP Spoofer: Redesigned ARP spoofing engine with enhanced thread synchronization and safer network state restoration upon exit.
• High-Speed Monitoring: Accelerated bandwidth monitoring with raw socket packet capture fallback and adaptive Curses / CLI UI rendering.

🛡️ Stealth & Reconnaissance

• Stealth Mode: Added stealth operation flag to minimize network footprint and detection.
• Enhanced Host Discovery: Integrated DNS hostname resolution and IEEE OUI MAC vendor lookup during network scans.

🧰 Management & Diagnostics

• Doctor Diagnostics: New doctor CLI command to verify system environment, Kernel modules (ifb, sch_tbf), permissions, and external dependencies.
• Session Persistence: Save and restore active target states and configurations across sessions (save / load).
• Analysis Export: Export bandwidth usage analysis data to structured files.

🔧 Shell, IO & Stability

• IO Improvements: Enhanced shell interactive line completion (readline), executable binary lookup (locate_bin), and privilege validation (sudo).
• Concurrency & Robustness: Multi-threading locking fixes, memory footprint optimizations, and graceful exception handling.