Offer wallboxes

The wallboxes (EV chargers) on an offer. Changeable while the offer is a draft.

📄️List the wallboxes of an offer

Returns all wallboxes of an offer. Requires the `read:offers` scope.

📄️Add a wallbox to an offer

Adds a wallbox to a draft offer. The offer's total price is updated. Requires the `write:offers` scope.

📄️Change a wallbox on an offer

Replaces a wallbox of a draft offer with what you send; fields you leave out go back to their default. Requires the `write:offers` scope.

📄️Remove a wallbox from an offer

Removes a wallbox from a draft offer. Requires the `write:offers` scope.