feat: enhance scanner config with additional ports, signatures, and CVEs

feat: optimize scanner defaults and enhance documentation

feat(exploits): integrate CVE database and add generic safe validation

Added validators of vulnerabilities

Clean progress tracking: percentage, status counts, no emojis

Add progress indicator: shows stats every 100 targets during fingerprinting

Fix JSON syntax: closing bracket for excluded_private_networks array

Comprehensive README: accurate features, config, benchmarks, legal disclaimers, troubleshooting

Robust RCE detection: format validation prevents false positives (11/11 tests pass)

Configurable cloud filtering: enabled flag + 13 major cloud ranges (AWS/Azure/GCP/Cloudflare)

Professional optimizations: port-specific timeouts, skip HTTPS screenshots, batch nmap (8x efficiency)

Config-driven: excluded_networks, max_heavy_tasks, scanner defaults + semaphore

Remove deprecated firmware_version.py - main scanner handles this

Fix: resume.py path + comprehensive CVE database (26 CVEs, enterprise vendors)

Add exploit verification: standalone script + improved exploits.py