Gen ai lab chapters

[Mjrovai]

Before submitting your Pull Request, please review and complete the items on this checklist.

• [x ] The text has been proofread for grammar and spelling errors.
• [x ] All images, figures, and tables render properly without any glitches.
• All images have a source or they are properly linked to external sites.
• The chapter's formatting is consistent with the rest of the book.
• [x ] The chapter has been locally built and tested using Quarto.

[Mjrovai]

I'm adding a New Lab Chapter for Raspberry Pi: GenAI—VLMs (Visual-Language Models). I also updated the _quarto.yml and raspi.qmd. The lab overview file still needs to be updated; a new line should be included in the table.