Show worktree root names when sharing additional projects on a call

Co-Authored-By: Antonio Scandurra <antonio@zed.dev>

crates/call/src/participant.rs

@@ -23,6 +23,6 @@ impl ParticipantLocation {
 #[derive(Clone, Debug)]
 pub struct RemoteParticipant {
     pub user: Arc<User>,
-    pub project_ids: Vec<u64>,
+    pub projects: Vec<proto::ParticipantProject>,
     pub location: ParticipantLocation,
 }