Add script to install all ComfyUI extension dependencies

arty.yml

@@ -356,14 +356,14 @@ scripts:
         echo ""
         echo "📦 Installing ${dir%/} dependencies..."
         if pip install -r "${dir}requirements.txt"; then
-          ((installed_count++))
+          installed_count=$((installed_count + 1))
           echo "  ✓ ${dir%/} dependencies installed"
         else
           echo "  ⚠ Warning: Some dependencies for ${dir%/} may have failed"
-          ((installed_count++))
+          installed_count=$((installed_count + 1))
         fi
       else
-        ((skipped_count++))
+        skipped_count=$((skipped_count + 1))
       fi
     done