🎨 Palette: Add contextual tooltips to README links

[google-labs-jules]

This change enhances the user experience of the GitHub profile README by adding title attributes to all external links. This creates descriptive tooltips that appear on hover, providing users with more context about the destination of each link without needing to click it. This small touch of delight makes the profile more interactive and informative.

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PR created automatically by Jules for task 5745672690066211027 started by @Moohan

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