When there are no search results, it's clear that a search is still
ongoing because the landing page says "Searching...". However, once
there's at least one result found, it becomes completely unclear when
search is actually finished. This adds a spinner immediately to the
right of the result counter that stops once the search is finished.


https://github.com/user-attachments/assets/a0ca4e2a-c506-42a4-bc4b-c1eb32d69e79

Release Notes:

- Added spinner to project search, indicating that a search is still
ongoing.

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Co-authored-by: Danilo Leal <daniloleal09@gmail.com>