Offer Reship from the order detail footer

[dt2patel]

Why this issue exists

The order detail footer's action validator modelled a Reship action that had no handler, so it never rendered. It was removed in #534 so the code stops looking like a live feature. This issue keeps the decision so it can be picked up.

Product decision (2026-06-11, from the removed validator header)

• Reship is a remediation action for any order that is not ORDER_CANCELLED, including after items complete.
• This was recorded as open assumption R1 together with Appeasement, and never confirmed with product.

Backend: missing

• The removed validator notes that the legacy OFBiz flow (ReShipOrderItems.ftl) was dropped in the OFBiz → Moqui migration.
• There is no reship service or REST resource in hotwax/oms service/oms.rest.xml today. A code search for "reship" only matches ProductStoreShipmentMeth.
• The Clone design (docs/OrderCloneDesign.md) treats "re-ship as a new order" as a case Clone covers. Decide whether Reship is its own flow (a replacement ship group on the same order) or a Clone preset before building a backend.

Where the removed code lived

• RESHIP case of validateFooterAction in src/utils/OrderActionValidator.ts @ 8d5ab9a

To do

• Product: decide whether Reship is a same-order replacement or a new order (a Clone preset).
• Backend service and REST mount for the chosen shape.
• Order detail footer action with its gate and handler.