rewrite setup-hub.sh with multi-distro package manager support

setup.sh

@@ -17,8 +17,9 @@ header "TinyBoard Setup"
 echo ""
 echo "  1) Set up this device as a new spoke"
 echo "  2) Onboard a new spoke from the hub"
+echo "  3) Set up this device as a new hub"
 echo ""
-read -rp "Choose [1/2]: " CHOICE
+read -rp "Choose [1/2/3]: " CHOICE
 
 case "$CHOICE" in
 1)
@@ -30,6 +31,11 @@ case "$CHOICE" in
     info "Starting hub onboarding..."
     exec "$SCRIPT_DIR/hub/onboard-spoke.sh"
     ;;
+3)
+    [ "$(id -u)" -eq 0 ] || die "Hub setup must be run as root"
+    info "Starting hub setup..."
+    exec "$SCRIPT_DIR/hub/setup-hub.sh"
+    ;;
 *)
     die "Invalid choice"
     ;;