feat: Major VTL System Upgrade (Auth, Monitoring, CLI, Installer)

- Web UI:
  - Added secure Authentication system (Login, 2 Roles: Admin/Viewer)
  - Added System Monitoring Dashboard (Health, Services, Power Mgmt)
  - Added User Management Interface (Create, Delete, Enable/Disable)
  - Added Device Mapping view in iSCSI tab (lsscsi output)
- Backend:
  - Implemented secure session management (auth.php)
  - Added power management APIs (restart/shutdown appliance)
  - Added device mapping API
- CLI:
  - Created global 'vtl' management tool
  - Added scripts for reliable startup (vtllibrary fix)
- Installer:
  - Updated install.sh with new dependencies (tgt, sudoers, permissions)
  - Included all new components in build-installer.sh
- Docs:
  - Consolidated documentation into docs/ folder

install.sh

@@ -75,12 +75,17 @@ install_dependencies_debian() {
         "apache2"
         "php"
         "libapache2-mod-php"
+        "tgt"
+        "open-iscsi"
     )
     
     apt-get install -y "${DEBIAN_PACKAGES[@]}"
     
     systemctl enable apache2
     systemctl start apache2
+
+    systemctl enable tgt
+    systemctl start tgt
     
     print_success "Dependencies installed (Debian/Ubuntu)"
 }
@@ -107,6 +112,8 @@ install_dependencies_rpm() {
         "sg3_utils"
         "httpd"
         "php"
+        "scsi-target-utils"
+        "iscsi-initiator-utils"
     )
     
     $PKG_MGR install -y "${RPM_PACKAGES[@]}"
@@ -114,6 +121,11 @@ install_dependencies_rpm() {
     systemctl enable httpd
     systemctl start httpd
     
+    if systemctl list-unit-files | grep -q "tgtd.service"; then
+        systemctl enable tgtd
+        systemctl start tgtd
+    fi
+    
     if command -v firewall-cmd &> /dev/null; then
         firewall-cmd --permanent --add-service=http
         firewall-cmd --reload
@@ -262,12 +274,33 @@ configure_system() {
 
     if [ "$DISTRO" = "debian" ] || [ "$DISTRO" = "ubuntu" ]; then
         usermod -a -G vtl www-data
+        
+        # Initialize users file securely if not exists
+        if [ ! -f "/etc/mhvtl/users.json" ]; then
+            echo '[{"username":"admin","password":"$2y$10$92IXUNpkjO0rOQ5byMi.Ye4oKoEa3Ro9llC/.og/at2.uheWG/igi","role":"admin","created":"'$(date '+%Y-%m-%d %H:%M:%S')'","enabled":true}]' > /etc/mhvtl/users.json
+        fi
+        chown www-data:www-data /etc/mhvtl/users.json
+        chmod 600 /etc/mhvtl/users.json
+        
         systemctl restart apache2 2>/dev/null || true
     else
         usermod -a -G vtl apache
+
+        # Initialize users file securely if not exists
+        if [ ! -f "/etc/mhvtl/users.json" ]; then
+            echo '[{"username":"admin","password":"$2y$10$92IXUNpkjO0rOQ5byMi.Ye4oKoEa3Ro9llC/.og/at2.uheWG/igi","role":"admin","created":"'$(date '+%Y-%m-%d %H:%M:%S')'","enabled":true}]' > /etc/mhvtl/users.json
+        fi
+        chown apache:apache /etc/mhvtl/users.json
+        chmod 600 /etc/mhvtl/users.json
+        
         systemctl restart httpd 2>/dev/null || true
     fi
 
+    if [ -f "$INSTALL_DIR/scripts/vtl" ]; then
+        ln -sf "$INSTALL_DIR/scripts/vtl" /usr/local/bin/vtl
+        chmod +x /usr/local/bin/vtl
+    fi
+
     if [ -f "$INSTALL_DIR/scripts/load-mhvtl.sh" ]; then
         ln -sf "$INSTALL_DIR/scripts/load-mhvtl.sh" /usr/local/bin/mhvtl-load
     fi
@@ -308,6 +341,8 @@ print_completion() {
     echo -e "  • Unload modules: ${YELLOW}mhvtl-unload${NC}"
     echo -e "  • Check status: ${YELLOW}systemctl status mhvtl${NC}"
     echo -e "  • View devices: ${YELLOW}lsscsi -g${NC}"
+    echo -e "  • VTL CLI Tool: ${YELLOW}vtl status${NC}"
+    echo -e "  • Default Web Login: ${YELLOW}admin / admin123${NC}"
     echo ""
 }