Update alternative names

Add, remove or replace the project's alternative names: other names the brand goes by (a former, local or shortened name), which count as the brand in every report. This is the app's Knowledge Base → Profile → Alternative names. Send add and/or remove, or replace on its own to set the whole list. Answers already collected follow the change. An added name's mentions under Other companies move to the brand. A removed name's brand mentions move to a competitor of that name, which is created if the project has none. Both moves run in the background, and a paused project queues neither. A name is matched ignoring case. Adding a name the project already has changes nothing and lists it in alreadyPresent. Removing a name it lacks returns 404 not_found and changes nothing. A project holds up to 25 names, each up to 120 characters. Adding needs the Member role; removing needs Owner, Super admin or Admin, since it creates competitors. Requires the knowledge:manage capability. A pitch project that is not currently active refuses with 409 INACTIVE_PITCH_PROMPT_MUTATION. The list reads back as profile.alternativeNames on the brand profile.