Create a LinkedIn text ad campaign (ad set)

Creates a TEXT_AD campaign (an ad set in Campaign Manager) — the small desktop-sidebar unit with a 25-character headline and a 75-character description. Campaign group (campaign), campaign and creative (ad); the campaign starts paused and holds everything back. Use when: the user has no company page to post from (text ads need none), or wants a cheap desktop-only test of a message before committing to sponsored content. CPCs are far lower than feed placements and so are click volumes. Do not use it as the main channel for a serious campaign: text ads do not appear on mobile at all, which is most of LinkedIn's traffic. Say that before recommending it. Do not exceed 25 characters of headline or 75 of description — LinkedIn truncates silently and the ad reads as an accident. Do not call it without a bid: LinkedIn text ads only bid manually (CPC or CPM), and a manual campaign without a bid never delivers. If the user has no figure, get LinkedIn's suggested range from linkedin_forecast_campaign_supply with campaign_type TEXT_AD and ask. Text ads run with BRAND_AWARENESS, WEBSITE_VISIT or WEBSITE_CONVERSION, never on the Audience Network. Returns the campaign and creative ids. Nothing delivers until the campaign is resumed. Say that the campaign is paused when you report the result, with the two links the result gives (LinkedIn Campaign Manager and the campaign's page in Adako), and offer "enable all": one linkedin_resume_campaign call, listed in the result as go_live.enable_all, one approval.