rue Add-to-Cart Functionality for Multiple Services in Booking

I know the top request is about adding multiple quantities of the same item, this is similar but a step beyond that. We need a true add-to-cart system where clients can select multiple different services before checkout, not just one product with add-ons later on.

There are a couple similar requests already in review but the current workaround still causes a lot of headache. Especially for build-your-own packages where clients pick individual services it gets confusing and clunky.

Most e-commerce platforms handle this with a simple cart system that lets you review all items before checkout. Implementing this in Spiro would massively improve booking flow reduce confusion and lost sales.

Fixed packages are okay now but flexible bundles suffer without this.