Fix: Improve Home Page Layout and bottom padding

[MahmudaJannat1]

This PR improves the Home Page layout by adding bottom padding to the animation list.
Currently, the last item (CurvedAnimation) gets partially cut off or hidden at the bottom of the screen on mobile devices. Adding this padding ensures a better user experience and full visibility.

Pre-launch Checklist

• I read the Flutter Style Guide recently, and have followed its advice.
• I signed the CLA.
• I read the Contributors Guide.
• I have added sample code updates to the changelog.
• I updated/added relevant documentation (doc comments with ///).

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[ericwindmill]

Hiya @MahmudaJannat1
It looks like there are a lot of changes that aren't related to the bug. Can you update the description with what changed and why?