Add tag for "generated image"

[sarge1989]

Issues

• Sometimes, AI generated content don't fit nicely into our current categorisation system
• Also, it's harder and harder to tell

Solution

• To implement a tag that is on top of the existing category system, i.e. not another category
• Based on the tag, to add a qualifier to the response to the user if a majority >50% tag it as such

Tasks

• [ ] Devs to add tagging mechanism to frontend, backend and database
• [ ] User team to think about what sort of qualifier paragraph to add to the existing response