Search in selections (#10831)

Release Notes:

- Adding [#8617 ](https://github.com/zed-industries/zed/issues/8617)

---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/terminal_view/src/terminal_view.rs

@@ -972,6 +972,7 @@ impl SearchableItem for TerminalView {
             word: false,
             regex: true,
             replacement: false,
+            selection: false,
         }
     }