project: Be explicit about project-searchability for buffers (#37773)

Closes https://github.com/zed-industries/zed/issues/28830

Release Notes:

- Fixed builtin buffers and log views showing up in project search

crates/activity_indicator/src/activity_indicator.rs

@@ -212,7 +212,8 @@ impl ActivityIndicator {
                 server_name,
                 status,
             } => {
-                let create_buffer = project.update(cx, |project, cx| project.create_buffer(cx));
+                let create_buffer =
+                    project.update(cx, |project, cx| project.create_buffer(false, cx));
                 let status = status.clone();
                 let server_name = server_name.clone();
                 cx.spawn_in(window, async move |workspace, cx| {