Expose "abandoned" as a quote status so we can run actions when an online order is abandoned

Expose abandoned as a quote status so teams can build automations and worklists around abandoned online orders.

Additional transcript context

• Apr 29 SE Attik transcript clarified a workflow gap after follow-up occurs.
• Teams need a way to distinguish abandoned quotes that are still untouched from abandoned quotes that have already been followed up on, without rejecting them immediately.
• A second follow-up stage, substatus, or separate worklist state would help teams clear clutter while still leaving the quote available for later acceptance.