🐛 Fix sidebar banner overflow

[xonas1101]

📌 Fixes

Fixes #722 (Use "Fixes", "Closes", or "Resolves" for automatic closing)

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📝 Summary of Changes

Extraccted the SidebarFooter component from RelatedProjects.tsx.
Fixed the sidebar footer overflow by correctly accounting for both the navbar and banner heights.
Added a small 500ms delay before measuring layout because the banner and styles weren’t fully rendered on first load, which was causing height calculations to return 0 sometimes. This makes the layout stable and consistent on every load.

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Changes Made

• Updated ...
• Refactored ...
• Fixed ...
• Added tests for ...

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Checklist

Please ensure the following before submitting your PR:

• I have reviewed the project's contribution guidelines.
• I have written unit tests for the changes (if applicable).
• I have updated the documentation (if applicable).
• I have tested the changes locally and ensured they work as expected.
• My code follows the project's coding standards.

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Screenshots or Logs (if applicable)

Before: Sidebar footer overflowing when banner is visible

After: Sidebar layout fixed with proper banner height handling

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👀 Reviewer Notes

Add any special notes for the reviewer here
This might need more refactors, I'll be happy to perform them, but for the time being, I think this works.

[kubestellar-prow]

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[kubestellar-prow]

Hi @xonas1101. Thanks for your PR.

I'm waiting for a kubestellar member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[xonas1101]

well this does need some work to be done, when scrolling down, the banner disappears as it should, but the sidebar doesnt resize automatically. I'll look into it in some time. Till then can we review the other stuff?
/cc @clubanderson