🎨 Palette: Add Tooltips to README Links

[google-labs-jules]

💡 What

Added title attributes to all external links in the README.md file. This creates tooltips that appear when a user hovers over the links.

🎯 Why

The tooltips provide extra context about the link's destination, making the profile page more informative and polished for sighted users. This is a small micro-UX enhancement that adds a touch of delight.

♿ Accessibility

While this change primarily benefits sighted mouse users, it does not negatively impact accessibility. The link text and existing image alt text already provide sufficient information for screen reader users. The change was made using standard Markdown, preserving the document's readability and structure.

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PR created automatically by Jules for task 2036070992899126880 started by @Moohan

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