Creates a text ad (creative) for a TEXT_AD campaign — does not require an organization page. headline ≤25, description ≤75 characters. intended_status: leave EMPTY (auto) and the ad follows its ad set like Campaign Manager does — under a DRAFT ad set it is created ACTIVE, so it starts serving the moment you activate the campaign and ad set, while nothing spends before that; under an ad set that is already ACTIVE or PAUSED it is created DRAFT so it never goes live unasked. Pass ACTIVE / DRAFT / PAUSED to force a status. A DRAFT ad does NOT serve even when its ad set is ACTIVE — activate it with update_linkedin_creative_status. confirm=false = preview.