Closes #50604


https://github.com/user-attachments/assets/8a85b39e-e463-4fee-bc1f-2a03fe193ce3


https://github.com/user-attachments/assets/8290bb06-1eaf-4852-9568-97654e30211e

### Results: 
Now, you can scroll the search results with the arrow keys.

### Suggestion:
While this is working, I like to propose some better UX.

When you scroll with the arrow keys, the whole search results are
scrolling along with the search bar. But, I think it would be better if
we keep the search bar fixed on top and only the results scroll. Here is
an example:


https://github.com/user-attachments/assets/af9dce73-27c6-407b-8180-2f771a85303b

If you think this will be better, please let me know, and I will update
this PR.

Thank you.

Release Notes:

- Fixed docs search results scrolling with arrow keys

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Co-authored-by: Gaauwe Rombouts <mail@grombouts.nl>