feat: subcomando uninstall

- core/uninstall.sh: run_uninstall() — confirmacion interactiva obligatoria (--yes la omite), rm -rf del symlink O directorio real + /opt/intel/openvino_2026.* (rm -rf no sigue symlinks), --purge-drivers opcional (dpkg -r de los 6 paquetes, best-effort con aviso)
- main.sh: dispatch en el mismo case que doctor (antes del root check); run_uninstall aplica su propio check de root

main.sh

@@ -18,10 +18,17 @@ source "$CORE_DIR/common.sh"
 # Subcommands (before the root check: doctor is a post-install user verification)
 case "${1:-}" in
     doctor)
+        shift
         source "$CORE_DIR/doctor.sh"
         run_doctor_checks
         exit 0
         ;;
+    uninstall)
+        shift
+        source "$CORE_DIR/uninstall.sh"
+        run_uninstall "$@"
+        exit 0
+        ;;
 esac
 
 # Option parsing (before the root check: parsing needs no privileges)