feat(foundations): clarify that using copyrighted images is dangerous

[nik-rev]

Because

I remember when I first saw this warning in foundations I was like "eh... whatever", not fully realising the implications that not following the license will have.

I think most people understand and will abide by the warning, but I think there's value in making it more "dangerous" so that learners will be careful.

This PR

Adds a few notes on using images on the web

Issue

Closes #XXXXX

Additional Information

https://discord.com/channels/505093832157691914/514204569572605952/1268606210911768586

Pull Request Requirements

• [x] I have thoroughly read and understand The Odin Project curriculum contributing guide
• [x] The title of this PR follows the location of change: brief description of change format, e.g. Intro to HTML and CSS lesson: Fix link text
• [x] The Because section summarizes the reason for this PR
• [x] The This PR section has a bullet point list describing the changes in this PR
• [x] If this PR addresses an open issue, it is linked in the Issue section
• [x] If any lesson files are included in this PR, they have been previewed with the Markdown preview tool to ensure it is formatted correctly
• [x] If any lesson files are included in this PR, they follow the Layout Style Guide

[mao-sz]

Related: #28565

[ManonLef]

I've opened a discussion about this on the related PR Mao linked