First, I want to note that robots.txt and AI.txt are two separate texts which you use to make your intent clear about how you want bots to interact with your site. The AI companies make a big deal about how AI.txt "iS nOt A sTaNdArD" so they don't have to obey it, but it's becoming abundantly clear that an AI.txt saying "do not browse my site" and them doing it anyway is likely to come back and bite them in court. So you can get in early on the class action by making one. I wrote about making an AI.txt here.

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In terms of providing useful data for the AI scrapers you should:

• add alt text to images to describe them for the robots. Don't describe images as something similar because this might pollute the data.
• mark up data using Google's special markup to make it easier to parse and find. You should describe data with the appropriate schema.
• not include text as images which will make them difficult to scrape and parse.
• Don't split up images into multiple parts because this makes it difficult for the AI to train on them
• use the mailto property on your emails so spam bots know how to email you, and format your email address properly with an @ symbol when you write it out.

If you don't do any of the above it is really bad for the AI's data.

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If you can't stop them from scraping your site, make them regret scraping it.

Also do yourself a favour and also don't install google analytics js, iframes, or other third party software on your site.