Dual-Tone-Icon-Pack: Platform Icon "search_again.svg”

The following icon should look the same as our `refresh.svg`. They need to be added to the icon mapping.

**Location:**
org.eclipse.search/icons/full/elcl16/search_again.svg

**Original:**
<img width="16" height="16" alt="Image" src="https://github.com/user-attachments/assets/75d9da68-2c5e-4368-bd35-549eebde0976" />