Add Bot Blocker - Apache User-Agent blocking manager

Features:
- Enable/disable bot blocking with one click
- Blocks security scanners (nikto, sqlmap, nmap, etc.)
- Blocks aggressive SEO bots (AhrefsBot, SemrushBot, etc.)
- Blocks AI crawlers (GPTBot, Claude-Web, ChatGPT-User, etc.)
- Blocks generic scrapers (Go-http-client, etc.)
- Automatic backups before changes
- Apache syntax validation before applying
- Safe restart with rollback on failure
- View current configuration
- Manage backups and restore

Configuration:
- File: /etc/apache2/conf.d/includes/pre_main_global.conf
- Blocks 24+ malicious bot user-agents
- Returns HTTP 403 Forbidden to blocked bots
- Zero impact on legitimate traffic

Integrated into Security Menu (option 16)

launcher.sh

@@ -139,6 +139,7 @@ show_security_menu() {
     echo ""
     echo -e "  ${YELLOW}13)${NC} 🔒 Enable cPHulk Protection  - Brute force protection"
     echo -e "  ${YELLOW}14)${NC} ⚙️  Optimize CT_LIMIT         - Connection tracking tuning"
+    echo -e "  ${YELLOW}16)${NC} 🤖 Block Malicious Bots      - User-Agent blocking (Apache)"
     echo ""
     echo -e "${BOLD}Analysis Tools:${NC}"
     echo ""
@@ -171,6 +172,7 @@ handle_security_menu() {
             13) run_module "security" "enable-cphulk.sh" ;;
             14) run_module "security" "optimize-ct-limit.sh" ;;
             15) bash "$BASE_DIR/tools/analyze-historical-attacks.sh" ;;
+            16) run_module "security" "bot-blocker.sh" ;;
             0) return ;;
             *) echo -e "${RED}Invalid option${NC}"; sleep 1 ;;
         esac