Make `SearchProject` a `Foreground` message

Antonio Scandurra and Nathan Sobo created

However, the randomized integration test is still failing:

```
ITERATIONS=100000 SEED=3027 OPERATIONS=200 cargo test --release test_random --package=zed-server -- --nocapture
```

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

Change summary

crates/rpc/src/proto.rs | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

Detailed changes

crates/rpc/src/proto.rs 🔗

@@ -190,8 +190,8 @@ messages!(
     (RegisterWorktree, Foreground),
     (RemoveProjectCollaborator, Foreground),
     (SaveBuffer, Foreground),
-    (SearchProject, Background),
-    (SearchProjectResponse, Background),
+    (SearchProject, Foreground),
+    (SearchProjectResponse, Foreground),
     (SendChannelMessage, Foreground),
     (SendChannelMessageResponse, Foreground),
     (ShareProject, Foreground),